Molecular Structure of a Hydridoniobocene Complex [Nb(η5-C5H4SiMe3)2(H)3] and Its Use as Catalyst for the Ring-Opening Polymerization of Cyclic Esters

被引：12

作者：

Alonso-Moreno, Carlos ^{[2
]}

Antinolo, Antonio ^{[1
]}

Garcia-Martinez, Joaquin C. ^{[2
]}

Garcia-Yuste, Santiago ^{[1
]}

Lopez-Solera, Isabel ^{[1
]}

Otero, Antonio ^{[1
]}

Perez-Flores, Juan C. ^{[1
]}

Tercero-Morales, Maria T. ^{[1
]}

机构：

[1] Univ Castilla La Mancha, Fac Ciencias Quim, Dept Quim Inorgan Organ & Bioquim, E-13071 Ciudad Real, Spain

[2] Univ Castilla La Mancha, Fac Farm, Dept Quim Inorgan Organ & Bioquim, Albacete 02071, Spain

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2012年 / 07期

关键词：

Metallocenes; Ring-opening polymerization; Hydride ligands; Niobium; Lactones; SINGLE-SITE CATALYSTS; SPECTROSCOPIC PROPERTIES; ZINC; TRIHYDRIDE; REACTIVITY; CHEMISTRY; NIOBIUM; LACTIDE;

D O I：

10.1002/ejic.201101263

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The second polyhydridoniobocene complex that was characterized by X-ray diffraction is reported. On the basis of H-H distances and H-Nb-H angles, [Nb(eta(5)-C5H4SiMe3)(2)(H)(3)] (1) is classified as a "compressed hydride". Compound 1 acts as an efficient single-component initiator for the ring-opening polymerization of epsilon-caprolactone and delta-valerolactone. epsilon-Caprolactone and delta-valerolactone are both polymerized within a few hours to yield high-to-medium-molecular-weight polymers with medium to broad polydispersities. Polymer end-group analysis showed that the polymerization proceeds through a coordination-insertion mechanism based on the cleavage of the ring between the oxygen atom and the acyl carbon atom.

引用

页码：1139 / 1144

页数：6

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