CN109206459A - A kind of preparation method of four ammonia platinum (II) of acetic acid - Google Patents

A kind of preparation method of four ammonia platinum (II) of acetic acid Download PDF

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CN109206459A
CN109206459A CN201811094140.4A CN201811094140A CN109206459A CN 109206459 A CN109206459 A CN 109206459A CN 201811094140 A CN201811094140 A CN 201811094140A CN 109206459 A CN109206459 A CN 109206459A
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platinum
acetic acid
ammonia
ammonia platinum
solution
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CN109206459B (en
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夏军
李富荣
索永喜
李波
易翔
郭福田
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Xuzhou Hootech New Materials Science & Technology Co Ltd
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    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F15/00Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
    • C07F15/0006Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table compounds of the platinum group
    • C07F15/0086Platinum compounds
    • C07F15/0093Platinum compounds without a metal-carbon linkage

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Abstract

The invention discloses a kind of preparation methods of four ammonia platinum (II) of acetic acid.The preparation method comprises the following steps: ammonium chloroplatinate (IV) is successively generated acetic acid four ammonia platinum (II) solution through three-step reaction with oxalic acid, ammonium hydroxide, calcium acetate, last four ammonia platinum (II) solution of acetic acid is precipitated to obtain acetic acid four ammonia platinum (II) crystal by solvent crystal after concentration, then the vacuum dried four ammonia platinum (II) of acetic acid for obtaining purity and being >=99.95%.Starting material ammonium chloroplatinate (IV) is the Conventional compounds of platinum in the present invention, and raw material is easy to get and yield is high, other auxiliary material oxalic acid, concentrated ammonia liquor and calcium acetate are cheap, greatly reduce production cost;In addition, this method not only avoids the residual of chloride ion and nitrate ion, the residual of silver ion in product is also reduced.The present invention carries out at normal temperatures and pressures, easy to operate, easily controllable, reaction yield height (> 92%), and product purity height (>=99.95%) is suitable for the batch and industrial production of four ammonia platinum (II) of acetic acid.

Description

A kind of preparation method of four ammonia platinum (II) of acetic acid
Technical field
The invention belongs to chemical catalysis technical fields, and in particular to a kind of preparation method of four ammonia platinum (II) of acetic acid.
Background technique
Platinum catalyst is widely used in the every field such as petrochemical industry, medication chemistry, vehicle exhaust and environmental improvement, and by The residual of chloride ion and nitrate ion in the precursor compound for prepare platinum catalyst, influences the high temperature resistant of platinum catalyst The service life of performance, activity and equipment, increasing with its dosage, requirement of the people to platinum catalyst is higher and higher, The lower require the residual of chloride ion and nitrate ion the better.
Four ammino platinum (II) class compounds are a kind of important platinum (II) compounds, are widely used in chemical catalysis and plating Industry.Wherein acetic acid four ammonia platinum (II) (Pt (NH3)4(CH3COO)2) it is highly soluble in water, it is organic molten insoluble in alcohols, ketone etc. Agent is that solubility is highest in current four ammoniac compounds of mainstream, is very suitable to infusion process and prepares platinum catalyst, because of its aqueous solution Containing acetate, buffering can be played the role of simultaneously, also there is the research for being used as electroplating main salt, so four ammonia platinum (II) of acetic acid It is increasingly becoming a kind of important platinum lead compound.The patent of Publication No. CN103113412A discloses a kind of without chlorine and nitre Water-soluble Pt (II) catalyst precursor and its synthetic method of sour silver, which passed through using tetraammineplatinum chloride as starting material Four ammino platinum of target compound acetic acid is obtained with acetic acid silver reaction.Since tetraammineplatinum chloride is not easy to obtain in this method, cost Higher and yield is not high;In addition silver acetate price is more expensive, and dosage is larger, and the disadvantages of remaining silver ion is easy in product, Therefore, which is restricted.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation method of four ammonia platinum (II) of acetic acid, starting material chlorine platinum in this method Sour ammonium (IV) is the Conventional compounds of platinum, and raw material is easy to get and yield is high, other auxiliary material oxalic acid, concentrated ammonia liquor and calcium acetate price are just Preferably, production cost can be reduced;In addition, this method is not only avoided that the residual of chloride ion and nitrate ion, moreover it is possible to reduce product The residual of middle silver ion.
To achieve the above object, a kind of preparation method of four ammonia platinum (II) of acetic acid, by ammonium chloroplatinate (IV) successively with oxalic acid, Ammonium hydroxide, calcium acetate generate four ammonia platinum (II) of acetic acid after three-step reaction, then after solvent crystal, drying, and specific reaction step is as follows:
(1) ammonium chloroplatinate (IV) is restored to obtain oxalic acid diamino platinum (II) solution with oxalic acid, reaction equation is as follows:
(NH4)2PtCl6+2H2C2O4=Pt (NH3)2(C2O4)+6HCl+2CO2
(2) oxalic acid diamino platinum (II) is transformed into oxalic acid four ammonia platinum (II) solution through concentrated ammonia liquor ammonification, and reaction equation is as follows:
Pt(NH3)2(C2O4)+2NH3·H2O=Pt (NH3)4(C2O4)+2H2O
(3) calcium acetate is added in four ammonia platinum (II) of oxalic acid and obtains four ammonia platinum (II) solution of acetic acid and calcium oxalate, reaction equation It is as follows:
Pt(NH3)4(C2O4)+Ca(CH3COO)2=Pt (NH3)4(CH3COO)2+CaC2O4
(4) by solvent crystal is precipitated to obtain four ammonia platinum of acetic acid after concentrated by rotary evaporation after the filtering of four ammonia platinum (II) solution of acetic acid (II) crystal, then the vacuum dried four ammonia platinum (II) of acetic acid for obtaining purity and being >=99.95%.
Preferably, the mass ratio of ammonium chloroplatinate (IV) and oxalic acid is 1:(0.4~0.7 in step (1)), reaction temperature 30 ~50 DEG C.
Preferably, the mass ratio of step (2) mesoxalic acid diamino platinum (II) and concentrated ammonia liquor is 1:(3~5), it is anti-to stir lower control Answer temperature at 50~60 DEG C.
Preferably, the weight ratio of four ammonia platinum (II) of step (3) mesoxalic acid and calcium acetate is 1:(1~1.2).
Preferably, acetic acid four ammonia platinum (II) solution that step (4) obtains is filtered to remove insoluble matter, and filtrate is directly concentrated under reduced pressure Concentrate is obtained, concentrate is added in alcohols or organic solvent of ketone under stiring, obtains white crystals, alcohols or ketone have The volume of solvent and the volume ratio of acetic acid four ammonia platinum (II) solution are (15~20): 1, after white crystals are filtered and are washed 50~80 DEG C of vacuum drying, obtain four ammonia platinum (II) of acetic acid.
Compared with prior art, in the present invention starting material ammonium chloroplatinate (IV) be platinum Conventional compounds, raw material is easy to get And yield is high, other auxiliary material oxalic acid, concentrated ammonia liquor and calcium acetate are cheap, greatly reduce production cost;In addition, this method The residual for not only avoiding chloride ion and nitrate ion also reduces the residual of silver ion in product.The vinegar of this method preparation Sour four ammonia platinum (II) have very high water solubility, and dissociation reaction occurs for the compound in aqueous solution, release stable with sun Ion Pt (NH3)4 2+, be conducive to carrier adsorption precursor compound when dipping, in addition, also containing acetate, energy in its aqueous solution Play the role of buffering simultaneously, also there is the research for being used as electroplating main salt.The method of the present invention carries out at normal temperatures and pressures, operation Simply, easily controllable, reaction yield height (> 92%), product purity height (>=99.95%) is suitable for four ammonia platinum (II) of acetic acid Batch and industrial production.
Specific embodiment
Invention is further described in detail with reference to embodiments.
Embodiment one
A kind of preparation method of four ammonia platinum (II) of acetic acid, comprising the following steps:
4.0g (0.044mol) oxalic acid is weighed into 300mL beaker, 50mL deionized water is added, then stirring and dissolving is delayed It is slow that 10.0g (0.023mol) ammonium chloroplatinate solid is added by several times, it is stirred to react 2h at 30 DEG C, there is a little undissolved solid, is stopped Stirring stands 10min filtering, obtains oxalic acid diamino platinum (II) solution (7.3g).Slowly add in oxalic acid diamino platinum (II) solution Enter ammonium hydroxide 25mL (22.7g), controls temperature at 50~60 DEG C, react 2h, stop heating, be cooled to room temperature, take 8g calcium acetate molten Solution is allowed to dissolve in 25mL deionized water, is then slowly added to calcium acetate solution into oxalic acid four ammonia platinum (8.0g) solution, until It is rear that 5mL acetic acid is added until not generating precipitating, continue to stir 0.5h, stands 30min, obtain four ammonia platinum solution of acetic acid and white Calcium oxalate, filtering are precipitated, and is washed 2 times with appropriate amount of deionized water, is concentrated under reduced pressure to give after filtrate and wash water merging at 80 DEG C The concentrate of 15mL adds 3mL acetic acid, and the concentrate for having acetic acid then will be added and be added in 300mL methanol solution, be precipitated White crystals obtain four ammonia platinum of 7.95g acetic acid, yield 92.2% in 50~80 DEG C of dry 2h after filtering and being washed with methanol.It produces Product examine is surveyed: chlorinity 7.6ppm.
Carry out elemental analysis, infrared spectroscopy detection, the detection of hydrogen spectrum and carbon spectrum detection, structure respectively by the sample to preparation Characteristic parameter are as follows: (1) elemental analysis: measured value C 12.52%, H 4.65%, N 14.6%, Pt 50.98%, with theoretical value C 12.59%, H 4.76%, N 14.69%, Pt 51.17% are consistent.(2)IR(cm-1, KBr) and 3259,3220 (s, v (NH3)); 1695,1653 (s, vas(C=O)).1406 (s, vs(C=O)).(3)1HNMR(D2O, ppm) 1.75 (s, 3H, CH3)。(4)13C NMR(D2O, ppm) 23.7 (CH3), 181.9 (COO).These above-mentioned parameters meet the chemical structure of invented compound.
Embodiment two
A kind of preparation method of four ammonia platinum (II) of acetic acid, comprising the following steps:
50.0g (0.555mol) oxalic acid is weighed into 2000mL beaker, addition 600mL deionized water, stirring and dissolving, then 100.0g (0.225mol) ammonium chloroplatinate solid is slowly added by several times, 1.5h is stirred to react at 40 DEG C, stops stirring, stands 10min filtering, obtains oxalic acid diamino platinum (II) solution (71.3g).Ammonium hydroxide is slowly added in oxalic acid diamino platinum (II) solution 320mL (291g) controls temperature at 50~60 DEG C, reacts 2h, stops heating, be cooled to room temperature, 86.9g calcium acetate is taken to be dissolved in It in 300mL deionized water, is allowed to dissolve, then calcium acetate solution is slowly added into oxalic acid four ammonia platinum (79.0g) solution, until not It is rear that 30mL acetic acid is added until generating precipitating, continue to stir 0.5h, stand 30min, obtains four ammonia platinum solution of acetic acid and white is heavy Shallow lake calcium oxalate, filtering, and washed 2 times with appropriate amount of deionized water, 100mL is concentrated under reduced pressure to give at 80 DEG C after filtrate and wash water merging Concentrate, add 5mL acetic acid, then will be added have acetic acid concentrate be added in 2000mL methanol solution, be precipitated it is white Color crystallization obtains four ammonia platinum of 80.06g acetic acid, yield 92.8% in 50~80 DEG C of dry 2h after filtering and being washed with methanol.It produces Product examine is surveyed: chlorinity 7.2ppm.
Carry out elemental analysis, infrared spectroscopy detection, the detection of hydrogen spectrum and carbon spectrum detection, structure respectively by the sample to preparation Characteristic parameter are as follows: (1) elemental analysis: measured value C 12.54%, H 4.63%, N 14.62%, Pt 50.96%, with theoretical value C 12.59%, H 4.76%, N 14.69%, Pt 51.17% are consistent.(2)IR(cm-1, KBr) and 3259,3220 (s, v (NH3));1695,1653 (s, vas(C=O)).1406 (s, vs(C=O)).(3)1HNMR(D2O, ppm) 1.75 (s, 3H, CH3)。 (4)13C NMR(D2O, ppm) 23.7 (CH3),181.9(COO).These parameters meet the chemical structure of invented compound.
Embodiment three
A kind of preparation method of four ammonia platinum (II) of acetic acid, comprising the following steps:
140g (1.555mol) oxalic acid is weighed into 5000mL beaker, addition 1000mL deionized water, stirring and dissolving, then 200g (0.451mol) ammonium chloroplatinate solid is slowly added by several times, 1h is stirred to react at 50 DEG C, stops stirring, stands 10min mistake Filter, obtains oxalic acid diamino platinum (II) solution (143.0g).Ammonium hydroxide 785mL is slowly added in oxalic acid diamino platinum (II) solution (715g) controls temperature at 50~60 DEG C, reacts 3h, stop heating, be cooled to room temperature, 190g calcium acetate is taken to be dissolved in 600mL It in deionized water, is allowed to dissolve, then calcium acetate solution is slowly added into oxalic acid four ammonia platinum (158.3g) solution, until not generating It is rear that 50mL acetic acid is added until precipitating, continue to stir 0.5h, stand 30min, obtains four ammonia platinum solution of acetic acid and white precipitate grass Sour calcium, filtering, and washed 2 times with appropriate amount of deionized water, the dense of 180mL is concentrated under reduced pressure to give at 80 DEG C after filtrate and wash water merging Contracting liquid adds 10mL acetic acid, and the concentrate for having acetic acid then will be added and be added in 3000mL acetone soln, white knot is precipitated Crystalline substance obtains four ammonia platinum of 159.6g acetic acid, yield 92.84% in 50~80 DEG C of dry 2h after filtering and being washed with methanol.Product inspection It surveys: chlorinity 7.4ppm.
Carry out elemental analysis, infrared spectroscopy detection, the detection of hydrogen spectrum and carbon spectrum detection, structure respectively by the sample to preparation Characteristic parameter are as follows: (1) elemental analysis: measured value C 12.56%, H 4.62%, N 14.60%, Pt 51.06%, with theoretical value C 12.59%, H 4.76%, N 14.69%, Pt 51.17% are consistent.(2)IR(cm-1, KBr) and 3259,3220 (s, v (NH3));1695,1653 (s, vas(C=O)).1406 (s, vs(C=O)).(3)1HNMR(D2O, ppm) 1.75 (s, 3H, CH3)。 (4)13C NMR(D2O, ppm) 23.7 (CH3),181.9(COO).These parameters meet the chemical structure of invented compound.

Claims (5)

1. a kind of preparation method of four ammonia platinum (II) of acetic acid, which is characterized in that by ammonium chloroplatinate (IV) successively with oxalic acid, ammonium hydroxide, Calcium acetate generates four ammonia platinum (II) of acetic acid after three-step reaction, then after solvent crystal, drying, and specific reaction step is as follows:
(1) ammonium chloroplatinate (IV) is restored to obtain oxalic acid diamino platinum (II) solution with oxalic acid, reaction equation is as follows:
(NH4)2PtCl6+2H2C2O4=Pt (NH3)2(C2O4)+6HCl+2CO2
(2) oxalic acid diamino platinum (II) is transformed into oxalic acid four ammonia platinum (II) solution through concentrated ammonia liquor ammonification, and reaction equation is as follows:
Pt(NH3)2(C2O4)+2NH3·H2O=Pt (NH3)4(C2O4)+2H2O
(3) addition calcium acetate obtains four ammonia platinum (II) solution of acetic acid in four ammonia platinum (II) of oxalic acid and calcium oxalate, reaction equation are as follows:
Pt(NH3)4C2O4+Ca(CH3COO)2=Pt (NH3)4(CH3COO)2+CaC2O4
(4) by solvent crystal is precipitated to obtain acetic acid four ammonia platinum (II) crystalline substance after concentrated by rotary evaporation after the filtering of four ammonia platinum (II) solution of acetic acid Body, then the vacuum dried four ammonia platinum (II) of acetic acid for obtaining purity and being >=99.95%.
2. a kind of preparation method of four ammonia platinum (II) of acetic acid according to claim 1, which is characterized in that chlorine in step (1) The mass ratio of platinic acid ammonium (IV) and oxalic acid is 1:(0.4~0.7), reaction temperature is 30~50 DEG C.
3. a kind of method for preparing four ammonia platinum (II) of acetic acid according to claim 1 or 2, which is characterized in that in step (2) The mass ratio of oxalic acid diamino platinum (II) and concentrated ammonia liquor is 1:(3~5), lower control reaction temperature is stirred at 50~60 DEG C.
4. a kind of preparation method of four ammonia platinum (II) of acetic acid according to claim 1 or 2, which is characterized in that in step (3) The weight ratio of four ammonia platinum (II) of oxalic acid and calcium acetate is 1:(1~1.2).
5. a kind of preparation method of four ammonia platinum (II) of acetic acid according to claim 1 or 2, which is characterized in that step (4) To acetic acid four ammonia platinum (II) solution be filtered to remove insoluble matter, filtrate is directly concentrated under reduced pressure to give concentrate, under stiring will be dense Contracting liquid is added in alcohols or organic solvent of ketone, obtains white crystals, the volume and four ammonia of acetic acid of alcohols or organic solvent of ketone The volume ratio of platinum (II) solution is (15~20): 1, it is dried in vacuo, obtains at 50~80 DEG C after white crystals are filtered and washed Four ammonia platinum (II) of acetic acid.
CN201811094140.4A 2018-09-19 2018-09-19 Preparation method of tetraammineplatinum acetate (II) Active CN109206459B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109897070A (en) * 2019-02-28 2019-06-18 徐州浩通新材料科技股份有限公司 A kind of preparation method of four ammonia palladium (II) of acetic acid
CN112939100A (en) * 2021-03-15 2021-06-11 徐州浩通新材料科技股份有限公司 Preparation method of tetraammine palladium (II) bicarbonate
CN113278034A (en) * 2021-05-14 2021-08-20 昆明贵金属研究所 Water-soluble Pt (IV) complex and preparation method and application thereof

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SU1631980A1 (en) * 1988-10-21 1996-09-27 МГУ им. М.В.Ломоносова Process for preparing oxalatodiaminoplatinum (ii)
CN101255176A (en) * 2008-04-03 2008-09-03 昆明贵金属研究所 Novel precursor compound for preparing platinum-carrying catalyst and synthetic method thereof
CN101389637A (en) * 2006-01-30 2009-03-18 普拉托技术(私有)公司 Preparation of platinum (ll) complexes
CN103113412A (en) * 2013-01-31 2013-05-22 昆明贵金属研究所 Water soluble Pt(II) catalyst precursor free from chlorine and nitrate and synthetic method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1631980A1 (en) * 1988-10-21 1996-09-27 МГУ им. М.В.Ломоносова Process for preparing oxalatodiaminoplatinum (ii)
CN101389637A (en) * 2006-01-30 2009-03-18 普拉托技术(私有)公司 Preparation of platinum (ll) complexes
CN101255176A (en) * 2008-04-03 2008-09-03 昆明贵金属研究所 Novel precursor compound for preparing platinum-carrying catalyst and synthetic method thereof
CN103113412A (en) * 2013-01-31 2013-05-22 昆明贵金属研究所 Water soluble Pt(II) catalyst precursor free from chlorine and nitrate and synthetic method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109897070A (en) * 2019-02-28 2019-06-18 徐州浩通新材料科技股份有限公司 A kind of preparation method of four ammonia palladium (II) of acetic acid
CN109897070B (en) * 2019-02-28 2021-06-18 徐州浩通新材料科技股份有限公司 Preparation method of tetraamminepalladium acetate (II)
CN112939100A (en) * 2021-03-15 2021-06-11 徐州浩通新材料科技股份有限公司 Preparation method of tetraammine palladium (II) bicarbonate
CN112939100B (en) * 2021-03-15 2021-11-09 徐州浩通新材料科技股份有限公司 Preparation method of tetraammine palladium (II) bicarbonate
CN113278034A (en) * 2021-05-14 2021-08-20 昆明贵金属研究所 Water-soluble Pt (IV) complex and preparation method and application thereof
CN113278034B (en) * 2021-05-14 2022-07-08 昆明贵金属研究所 Water-soluble Pt (IV) complex and preparation method and application thereof

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