Preparation of bifluorenes via the synthesis and thermal decomposition of fluorenyltitanium(IV) trichlorides.: Molecular and crystal structure of 9,9′-bis(trimethylsilyl)-bi-9,9′-fluorene

被引：17

作者：

Knjazhanski, SY ^{[1
]}

Moreno, G

Cadenas, G

Belsky, VK

Bulychev, BM

机构：

[1] Ctr Invest Quim Aplicada, Saltillo 25100, Coahuila, Mexico

[2] Karpov Inst Physicochem, Moscow, Russia

[3] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, Russia

来源：

TETRAHEDRON | 1999年 / 55卷 / 06期

关键词：

coupling reactions; fluorenes; titanium compounds; polymerisation;

D O I：

10.1016/S0040-4020(98)01208-3

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

The reaction of B-substituted trimethyltinfluorenes with TiCl4 in hexanes at -40 degrees C leads to unstable fluorenyltitanium(IV) trichlorides which thermal radical decomposition gives quantitatively TiCl4 and corresponding bifluorenes: (C13H9)(2) (3a), (9-EtC13H8)(2) (3b) and (9-SiMe3C13H8)(2) (3c). Crystals of 3c are monoclinic (space group P 2(1)/n), a= 15.059 Angstrom, b= 10.254 Angstrom, c= 18.172 Angstrom, beta= 109.20 deg. IIIc dissociates at 100 degrees C to give two radicals which initiate effectively radical polymerizations of methyl methacrylate and styrene. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：1639 / 1646

页数：8