Sequential bond energies of Pt+(NH3)x (x=1-4) determined by collision-induced dissociation and theory

被引：11

作者：

Liyanage, R

Styles, ML

O'Hair, RAJ

Armentrout, PB ^{[1
]}

机构：

[1] Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA

[2] Univ Melbourne, Sch Chem, Parkville, Vic 3052, Australia

来源：

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY | 2003年 / 227卷 / 01期

关键词：

sequential bond energies; collision-induced dissociation; Pt+(NH3)(x); guided ion beam; metal-ligand complexes; ab initio calculations;

D O I：

10.1016/S1387-3806(03)00050-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The sequential bond energies of Pt+ (NH3)(x) (x = 1-4) are determined by collision-induced dissociation (CID) with Xe using guided-ion beam tandem mass spectrometry. Analysis of the kinetic energy-dependent cross sections includes consideration of multiple ion-neutral collisions, the internal energies of the complexes, and the dissociation lifetimes. We obtain the following 0 K bond energies in eV (kJ/mol): 2.84 +/- 0.12 (274 +/- 12),2.71 +/- 0.10 (261 +/- 10),0.80 +/- 0.05 (77 +/- 5), and 0.48 +/- 0.04 (46 +/- 4) for (NH3)(x-1)Pt+-NH3 with x = 1-4, respectively. These values are in reasonable agreement with results of density functional ab initio calculations performed here. The trend in these bond energies is compared with those of platinum carbonyl cations and nickel ammonia cation complexes and discussed in terms of sdsigma-hybridization, electrostatic interactions, and ligand-ligand steric interactions. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：47 / 62

页数：16

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