CN1139605C - 硅桥连茂金属化合物的合成及应用 - Google Patents
硅桥连茂金属化合物的合成及应用 Download PDFInfo
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- CN1139605C CN1139605C CNB001327550A CN00132755A CN1139605C CN 1139605 C CN1139605 C CN 1139605C CN B001327550 A CNB001327550 A CN B001327550A CN 00132755 A CN00132755 A CN 00132755A CN 1139605 C CN1139605 C CN 1139605C
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- metallocene compound
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Abstract
本发明涉及硅桥连茂金属化合物的合成。它是通式(I)化合物,其中,M=Zr,n′=1:R=Me,n=4,R′=H;M=Zr、Ti,n′=2,R=But,n=1,R′=But;M=Ti,n′=3,R=But,n=1,R′=But。将环戊二烯先和二氯硅烷反应,经减压蒸馏得到纯的一氯代硅烷,再与环戊二烯反应,得到硅桥连配体再与金属氯化物反应。本发明与MAO配合使用,用于乙烯聚合的催化剂,催化活性高,其活性达到了1.08×107gPE/mol·Zr·h。
Description
技术领域
本发明涉及硅桥连茂金属化合物的合成及应用。
背景技术
已用于乙烯聚合茂金属硅桥连化合物,如下面所示:W.Kaminsky,M.Arndt.Advanced in Polymer Science,1997,127,143(Springer-verlag,BerlinHerdelberg);L.Resconi,R.L.Jones.Organometallic,1996,15,998-1005;K.Patsidis,H.G.AltJ.Organomet.Chem.,1996,509,115。
硅桥连二端为不对称的环戊二烯基的茂金属化合物报道较少,且合成方法不明确。
发明内容
M=Zr、Ti,n’=2,R=But,n=1,R’=But;
M=Ti,n’=3,R=But,n=1,R’=But。
本发明是在-78-0℃下,将位阻大的取代环戊二烯负离子化,然后同至少2.5倍量的氯硅烷反应4~24h,分离提纯,得到一氯代硅烷中间体,然后此中间体再同位阻较小的取代环戊二烯负离子在-78℃-0℃下反应12-24h,分离提纯,得到不对称的硅桥连环戊二烯配体。在0℃下,将此配体负离子化反应24-48h,再和金属氯化物反应36-48h,得到目标产物。其具体合成方法步骤如下:
本发明与MA0配合,可用于乙烯聚合,其活性可达到10.8kgPE/mmol.Zrh以上。
具体实施方式
实例1化合物1的合成:
在装有磁子的250mL三口瓶中,加入3.34g(10.0mmol)TiCl4·2THF和50mL THF。在0℃搅拌下滴加[Li(C5H4)SiMe2(C5HMe4)Li](10.0mmol)的THF溶液。完后室温反应2h,然后加热回流24h,得深红色溶液。真空除去所有溶剂,残留物中加入80mL CH2Cl2,过滤除去无机盐。滤液浓缩后冷冻,析出红色片状晶体。过滤,得1.1g红色片状晶体1。1的元素分析和1H NMR数据见表4.1和4.2中;MS(intensity%):360(40,M+),324(49,[M-HCl]+),290(10,[M-Cl2]+),288(73,[M-2 HCl]+),267[11,M-Me2SiCl]+),265(14),240(17,[M-C5H4]+),242(14,M-Cl2-Ti)+),230(12,[M-2 HCl-Me2Si]+),121(17,[C5HMe4]+),120(40,[C5Me4]+),118(55,[TiCl2]+),105(60,[C5Me3]+),95(40,[C5HMe4-C2H2]+),93(100,[Me2SiCl]+),83(56,[TiCl]+),77(35,C6H5 +).化合物2的合成
2用与1类似的方法制得。3.85g(10.2mmol)ZrCl4·2THF与等摩尔的配体双锂盐在THF溶液中室温反应12h,然后加热回流12h,得到2.0g淡黄绿色晶体2。2的元素分析和1H NMR数据见表4.1和4.2中;MS(intensity %):402(34,M+),367(47,[M-Cl]+),366(84,[M-HCl]+),351(25,[M-HCl-CH3]+),330(11,[M-2 HCl]+),315(7,[M-2 HCl-CH3]+),311(14,[M-Me2SiCl]+),309(20),307(26),282(9,[M-C5Me4]+),229(26),227(25),203(21),190(21),177(27),164(23),121(10,[C5HMe4]+),119(30,[C5HMe4-H2]+),115(14,[C5HMe4-CH4]+),95(39,[C5HMe4-C2H2]+),93(100,[Me2SiCl]+)。
实例2化合物3的合成
100mL Schlenk瓶中加入2.22g(6.2mmol)配体Me2Si(3-But-(C5H4))2及50mL THF,0℃滴加6.2mL(2.0N,12.4mmol)n-BuLi的己烷溶液。室温搅拌6h,得淡黄色双锂盐溶液。3.70g(9.8mmol)ZrCl4·2THF溶于60mL THF,室温加入等摩尔的配体双负离子溶液,室温反应12h,加热回流12h,真空除去所有溶剂,然后用与2相同的方法处理,得到0.54g白色晶体3。3的元素分析和1H NMR数据见表4.1和4.3中;MS(intensity%):516(100,M+),481(4,[M-Cl]+),445(7,[M-Cl-HCl]+),423(69,[M-Cl-Me2Si]+),407(18,[M-HCl-Me3Si]+),371(9,[M-Me3Si-2 HCl]+),163(29,[CpButSiMe]+),73(31,Me3Si+)。表l化合物l~3的分析数据
表1化合物1-~31H NMR数据
Comp. | Formula | Color | Yield(%) | Analysis Found(Required) | |
C(%) | H(%) | ||||
l | C16H22Cl2SiTi | deep-red | 3l | 52.99(53.20) | 5.97(6.14) |
2 | C16H22Cl2SiZr | pale-green | 49 | 47.39(47.50) | 5.44(5.48) |
3 | C22H36Cl2Si2Zr | white | 11 | 50.70(50.93) | 7.67(6.99) |
Complex | δC5H4(Δδ) | δC5Me4(Δδ) | δSiMe2 |
1 | 7.17(t,2)5.57(t,2)(1.60) | 2.10(s,6)1.82(s,6)(0.28) | 0.85(s,6) |
2 | 6.99(t,2)5.69(t,2)(1.30) | 2.01(s,6)1.91(s,6)(0.10) | 0.83(s,6) |
meso-3 | 6.65(t,2)6.57(t,2)6.43(t,2) | 1.30(s,18) | 0.43(s,6)0.36(s,6) |
实例3
乙烯聚合实验在特制的带夹套的250mL三口瓶中进行。该三口瓶装上电动搅拌,用N2气充排三次,真空状态下充入乙烯气体,由电磁阀控制体系压力略高于1atm。加入100mL甲苯,恒温10min使乙烯气体饱和。然后依次加入MAO和催化剂的甲苯溶液,记录配气罐内压力随聚合时间的变化。聚合一定时间后,加入100mL酸化乙醇(含10%HCl)终止反应。抽滤,用100mL乙醇洗涤。得到的聚合物于60℃真空干燥至恒重。称重,计算催化活性。聚合物的分子量用凝胶渗透色谱(GPC)测定。表31~3/MAO乙烯聚合结果
Polymerization conditions:[M]=3.0×10-6mol,Al/Zr=2500,t=30min,1atm of monomerpressure,in 100mL toluene.A:activity(kgPE/mmol·Zr·h);Mη:g/mol,determined by GPC in o-C6H4Cl2 at 135℃
Catalyst | Tp(℃) | Yield(g) | A | Mη(×10-4) | Mw/Mn |
1 | 204060 | 0.460.640.53 | 0.310.420.35 | ||
2 | 304050607080 | 3.002.732.756.9616.2010.08 | 2.001.821.834.6410.86.72 | 19.412.08.076.355.203.37 | 2.602.862.772.592.212.44 |
meso-3 | 304060 | 3.132.692.10 | 2.091.791.40 | 7.075.674.41 | 3.17 |
Claims (3)
1、一种硅桥连茂金属化合物,其特征在于它的通式为(I):其中,M=Zr,n’=1,R=Me,n=4,R’=H;或M=Zr,n’=2,R=But,n=1,R’=But;
M=Ti,n’=3,R=But,n=1,R’=But;或M=Ti,n’=2,R=But,n=1,R’=But。
2、权利要求1所说的硅桥连茂金属化合物的合成方法,其特征在于它的合成步骤是:在-78-0℃下,将取代环戊二烯负离子化,然后同至少2.5倍量的氯硅烷反应4~24h,分离,得到一氯代硅烷中间体,然后此中间体再同取代环戊二烯负离子在-78℃-0℃下反应12-24h,分离,得到不对称的硅桥连环戊二烯配体;在0℃下,将此配体负离子化反应24-48h,再和金属氯化物反应36-48h,得到目标产物。
3、权利要求1所说的硅桥连茂金属化合物与MAO配合用于乙烯聚合。
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JP4062929B2 (ja) * | 2002-02-08 | 2008-03-19 | 住友化学株式会社 | 遷移金属錯体、配位子、オレフィン重合用触媒およびオレフィン重合体の製造方法 |
US8637616B2 (en) | 2010-10-07 | 2014-01-28 | Chevron Philips Chemical Company Lp | Bridged metallocene catalyst systems with switchable hydrogen and comonomer effects |
US8629292B2 (en) | 2010-10-07 | 2014-01-14 | Chevron Phillips Chemical Company Lp | Stereoselective synthesis of bridged metallocene complexes |
US8609793B2 (en) | 2010-10-07 | 2013-12-17 | Chevron Phillips Chemical Company Lp | Catalyst systems containing a bridged metallocene |
US11369949B2 (en) * | 2018-06-04 | 2022-06-28 | Exxonmobil Chemical Patents Inc. | Metallocenes with Si—Si bridges |
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