Spectroscopic and Computational Characterization of the HCO•••H2O Complex

被引：23

作者：

Cao, Qian ^{[1
]}

Berski, Slawomir ^{[2
]}

Rasanen, Markku ^{[1
]}

Latajka, Zdzislaw ^{[2
]}

Khriachtchev, Leonid ^{[1
]}

机构：

[1] Univ Helsinki, Dept Chem, FIN-00014 Helsinki, Finland

[2] Univ Wroclaw, Fac Chem, PL-50383 Wroclaw, Poland

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2013年 / 117卷 / 21期

基金：

芬兰科学院;

关键词：

RARE-GAS MATRICES; AB-INITIO; WATER COMPLEXES; HYDROGEN-ATOMS; UV PHOTOLYSIS; FORMIC-ACID; HCO; SPECTRA; CHEMISTRY; KINETICS;

D O I：

10.1021/jp4009477

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 complexes of HCO with water are prepared in a Kr matrix and characterized by IR spectroscopy with the aid of ab initio calculations. The calculations at the UCCSD(T)/aug-cc-pVTZ level of theory predict three structures of the HCO center dot center dot center dot H2O complex. In the "linear" structure I, a hydrogen atom of water interacts with the oxygen atom of HCO. In structure II, the hydrogen atom of HCO interacts with the oxygen atom of water. The "cyclic" structure III has the C-H center dot center dot center dot O and O-H center dot center dot center dot O hydrogen bonds simultaneously. In the experiment, the HCO center dot center dot center dot H2O complex is produced by photolysis of HCOOH/HY/Kr (Y = Br and Cl) matrices followed by thermal annealing at about 30 K, which promotes the H + CO center dot center dot center dot H2O -> HCO center dot center dot center dot H2O reaction. The analysis of the spectroscopic data shows that the main product has structure III whereas the formation of structure II is less efficient. The experiments show no evidence of the weakest structure I. The experiments with deuterated formic acid (DCOOH) provide additional support of the proposed assignment.

引用

页码：4385 / 4393

页数：9

共 62 条

[51] Complexes and clusters of water relevant to atmospheric chemistry:: H2O complexes with oxidants [J].