STRUCTURE AND ELECTRONIC STATE OF MOLYBDENUM SUBCARBONYL SPECIES ENCAGED IN ZEOLITE

被引：43

作者：

OKAMOTO, Y ^{[1
]}

IMANAKA, T ^{[1
]}

ASAKURA, K ^{[1
]}

IWASAWA, Y ^{[1
]}

机构：

[1] UNIV TOKYO,FAC SCI,DEPT CHEM,BUNKYO KU,TOKYO 113,JAPAN

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 09期

关键词：

D O I：

10.1021/j100162a049

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The structure and electronic state of molybdenum subcarbonyl species anchored in alkali-metal cation exchanged zeolites were elucidated by means of EXAFS, IR, and XPS analyses. The subcarbonyl species were produced at 373 K by evacuating Mo(CO)6 entrapped in the zeolite. The structure of the Mo-subcarbonyl species was found to be monomeric Mo(CO)3(OZ)3 with a fac configuration (OZ: zeolite framework oxygen). The Mo-C bond distance is very short (0.186-0.189 nm), suggesting strong d --> pi* back donations from the Mo atom to the CO ligands. The electron density of Mo in Mo(CO)3(OZ)3 increases with increasing basic strength of OZ in the order HY approximately LiY < NaY approximately CsY.

引用

页码：3700 / 3705

页数：6

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