Bimetallic catalytic complexes for the copolymerization of carbon dioxide and an epoxide

Patent metadata

Field	Value
Publication number	US-9453104-B2
Application number	US-98953709-A
Country	US
Kind code	B2
Filing date	Apr 24, 2009
Priority date	Apr 25, 2008
Publication date	Sep 27, 2016
Grant date	Sep 27, 2016

Abstract

The present invention provides a novel catalyst of formula (I): wherein M is selected from Zn(H), Co(II), Mn(II), Mg(II), Fe(II), Cr(III)-X or Fe(III)-X, and the use thereof in polymerizing carbon dioxide and an epoxide.

First claim

The invention claimed is:

1. A catalyst of formula (1)

wherein R 1 and R 2 are independently hydrogen, alkyl, haloalkyl, aryl, halide, amine, a nitro group, an ether group, a silyl ether group, a nitrile group or an acetylide group;
R 3 is substituted C 3 alkylene;
R 4 is H, alkyl, aryl or alkylaryl;
E 1 is C, E 2 is O, S or NH or E 1 is N and E 2 is O;
X is OCOCH 3 , OCOCF 3 , OSO 2 C 7 H 7 , OSO(CH 3 ) 2 , alkyl, alkoxy, halide or amido; and
M is Zn(II), Co(II), Mg (II), Co (III)-X, or Fe(III)—X.

2. A catalyst as claimed in claim 1 wherein R 1 and R 2 are independently selected from hydrogen, tBu, Me, CF 3 , phenyl, F, Cl, Br, I, NMe 2 , NEt 2 , NO 2 , OMe, OSiEt 3 , CNMe, CN and c≡C-Ph.

3. A catalyst as claimed in claim 1 wherein R 3 is 2,2-dimethylpropylene, sec-butylene, 1,1-dimethylpropylene, 1,2-dimethylpropvlene, 1-ethylpropylene, 1-ethyl-2-methylpropylene, or 1,1,2-trimethylpropylene.

4. A catalyst as claimed in claim 1 wherein R 4 is H, Me, Et, Bn, tBu or Ph.

5. A catalyst as claimed in claim 1 wherein X is OCOCH 3 , OCOCF 3 , OSO 2 C 7 H 7 , OSO(CH 3 ) 2 , Et, Me, PhOEt, OMe, OiPr, OtBu, Cl, Br, 1, F, N(iPr) 7 or N(SiMe 3 ) 2 .

6. A catalyst having a structure selected from:

Assignees

• Williams Charlotte K
• Kember Michael
• Knight Paul
• Imp Innovations Ltd

Inventors

• Williams Charlotte K
• Kember Michael
• Knight Paul

Classifications

• B01J31/1835

  comprising aliphatic or saturated rings · CPC title

• B01J31/04

  containing carboxylic acids or their salts {(B01J31/0277 - B01J31/0298 take precedence; multi-metal carboxylate complexes like Pd (II) acetate, i.e. Pd3 (OAc) 6 or Cr(II)acetate, i.e. Cr2(OAc)4 B01J31/2226)} · CPC title

• B01J31/2239

  Bridging ligands, e.g. OAc in Cr2(OAc)4, Pt4(OAc)8 or dicarboxylate ligands · CPC title

• B01J2531/0216

  Bi- or polynuclear complexes, i.e. comprising two or more metal coordination centres, without metal-metal bonds, e.g. Cp(Lx)Zr-imidazole-Zr(Lx)Cp · CPC title

• B01J2531/22

  Magnesium · CPC title