The preparation, molecular structure and catalytic relevance of Ti(OSiPh3)4 and Ti(OGePh3)4

被引：35

作者：

Johnson, BFG

Klunduk, MC

Martin, CM

Sankar, G

Teate, SJ

Thomas, JM

机构：

[1] Univ Cambridge, Dept Chem, Univ Chem Labs, Cambridge CB2 1EW, England

[2] UCL Royal Inst Great Britain, Davy Faraday Res Labs, London W1X 4BS, England

[3] CCLRC, Daresbury Labs, Warrington WA4 4AD, Cheshire, England

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2000年 / 596卷 / 1-2期

基金：

英国工程与自然科学研究理事会;

关键词：

micro-crystal diffraction; epoxidation reaction; catalyst;

D O I：

10.1016/S0022-328X(99)00744-5

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The preparation, spectroscopic characterisation and molecular structures of the four-coordinate, tetrahedral and monomeric compounds Ti(OSiPh(3))(4) and Ti(OGePh(3))(4) are presented and discussed. The catalytic inactivity of both of these compounds may be rationalised on the basis of the steric inaccessibility of the substrates to the Ti(IV) active sites, which are effectively shrouded by the bulky triphenyl groups. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：221 / 225

页数：5

共 28 条

[1] Synthesis and structural characterisation of tripodal titanium silsesquioxane complexes: a new class of highly active catalysts for liquid phase alkene epoxidation [J].

Crocker, M ;

Herold, RHM ;

Orpen, AG .

CHEMICAL COMMUNICATIONS, 1997, (24) :2411-2412

[2] SYNTHESIS AND PROPERTIES OF GERMANIUM PEROXIDES AND HYDROPEROXIDES [J].

DANNLEY, RL ;

FARRANT, GC .

JOURNAL OF ORGANIC CHEMISTRY, 1969, 34 (08) :2428-&

[3] NOVEL VOLATILE AZATRANES OF GROUP-4 METALS [J].

DUAN, ZB ;

NAIINI, AA ;

LEE, JH ;

VERKADE, JG .

INORGANIC CHEMISTRY, 1995, 34 (22) :5477-5482

[4] THE CRYSTAL AND MOLECULAR-STRUCTURE OF HEXADECAPHENYLOCTASILOXYSPIRO(9,9)TITANATE(IV) [J].

HURSTHOUSE, MB ;

HOSSAIN, A .

POLYHEDRON, 1984, 3 (01) :95-97

[5]

Klunduk MC, 1999, CHEM-EUR J, V5, P1481

[6] Structure-functionality relationships of grafted Ti-MCM41 silicas. Spectroscopic and catalytic studies [J].

Marchese, L ;

Gianotti, E ;

Dellarocca, V ;

Maschmeyer, T ;

Rey, F ;

Coluccia, S ;

Thomas, JM .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1999, 1 (04) :585-592

[7] Probing the titanium sites in Ti-MCM41 by diffuse reflectance and photoluminescence UV-Vis spectroscopies [J].

Marchese, L ;

Maschmeyer, T ;

Gianotti, E ;

Coluccia, S ;

Thomas, JM .

JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (44) :8836-8838

[8] Spectroscopic tools for probing the isolated titanium centres in MCM41 mesoporous catalysts [J].

Marchese, L ;

Gianotti, E ;

Maschmeyer, T ;

Martra, G ;

Coluccia, S ;

Thomas, JM .

NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS, 1997, 19 (11) :1707-1718

[9] HETEROGENEOUS CATALYSTS OBTAINED BY GRAFTING METALLOCENE COMPLEXES ONTO MESOPOROUS SILICA [J].

MASCHMEYER, T ;

REY, F ;

SANKAR, G ;

THOMAS, JM .

NATURE, 1995, 378 (6553) :159-162

[10] Modelling the active sites of heterogeneous titanium-centred epoxidation catalysts with soluble silsesquioxane analogues [J].

Maschmeyer, T ;

Klunduk, MC ;

Martin, CM ;

Shephard, DS ;

Thomas, JM ;

Johnson, BFG .

CHEMICAL COMMUNICATIONS, 1997, (19) :1847-1848

← 1 2 3 →