NEXAFS IDENTIFICATION OF A CATALYTIC REACTION INTERMEDIATE - C4H4 ON PD(111)

被引:51
作者
ORMEROD, RM
LAMBERT, RM
HOFFMANN, H
ZAERA, F
YAO, JM
SALDIN, DK
WANG, LP
BENNETT, DW
TYSOE, WT
机构
[1] UNIV WISCONSIN,DEPT CHEM,MILWAUKEE,WI 53211
[2] UNIV WISCONSIN,SURFACE STUDIES LAB,MILWAUKEE,WI 53211
[3] UNIV WISCONSIN,DEPT PHYS,MILWAUKEE,WI 53211
[4] UNIV CALIF RIVERSIDE,DEPT CHEM,RIVERSIDE,CA 92521
[5] UNIV CAMBRIDGE,DEPT CHEM,CAMBRIDGE CB2 1EW,ENGLAND
关键词
D O I
10.1016/0039-6028(93)90274-N
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
Polarisation-dependent NEXAFS data are presented for the reaction intermediate C4H4 chemisorbed on Pd(III). Comparison of these data with calculated spectra indicates that this species is a metallocycle with slightly expanded (approximately 0.05 angstrom) C-C bonds. Dependence of the resonance intensities on photon incidence angle shows that the molecular plane is tilted at approximately 35-degrees with respect to the metal surface. The assigned chemical identity and absorption geometry are fully consistent with all the reactive behaviour of C4H4.
引用
收藏
页码:277 / 286
页数:10
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