Open AccessComparative study of the gas-phase bond strengths of CO2 and N2O with the halide ions
Author(s) -
Kenzo Hiraoka,
Kazuo Aruga,
Susumu Fujimaki,
Shinichi Yamabe
Publication year - 1993
Publication title -
journal of the american society for mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.961
H-Index - 127
eISSN - 1879-1123
pISSN - 1044-0305
DOI - 10.1016/1044-0305(93)85043-w
Subject(s) - chemistry , halide , ion , covalent bond , cluster (spacecraft) , analytical chemistry (journal) , electron transfer , mass spectrometry , crystallography , yield (engineering) , electron shell , phase (matter) , inorganic chemistry , atomic physics , ionization , materials science , physics , organic chemistry , chromatography , computer science , metallurgy , programming language
Thermodynamic data, ΔH n-1, n (o) and ΔS n-1, n (o), for clustering reactions of halide ions X(-)(X = F, Cl, Br, and I) with N2Owere measured with a pulsed electron beam high-pressure mass spectrometer. In contrast to the fact that CO2 forms a covalent bond with the fluoride ion to yield the fluoroformate ion, FCO2 (-), the interaction between F(-) and N2O is mainly electrostatic. It was found that the cluster ions F(-) (N2O)n complete the first shell at n = 6, thus forming an octahedral structure. The difference between F-CO2 (-) and F(-) ... N2O is discussed in terms of Coulombic, exchange, and charge-transfer interactions. The X(-) (N2O)2 clusters (X = Cl, Br and I) are found to be of C2h symmetry, while F(-) (N2O)2 is of a twisted form and is slightly asymmetric due to a slight participation of covalency (charge transfer) in the core ion F(-) ... N2O.