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Infrared spectrum of the disilane cation (Si(2)H(6)(+)) from Ar-tagging spectroscopy.
MedLine Citation:
PMID:  23325390     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The infrared spectrum of the disilane cation, Si(2)H(6)(+), in its (2)A(1g) ground state is inferred from photodissociation of cold Si(2)H(6)(+)-Ar(n) complexes (n = 1, 2). Vibrational analysis is consistent with a D(3d) symmetric structure of H(3)SiSiH(3)(+) generated by ionization from the bonding σ(SiSi) orbital. Structural, vibrational, and electronic properties of Si(2)H(6)((+)) and Si(2)H(6)(+)-Ar(1,2) are determined at the MP2/aug-cc-pVTZ and B3LYP/aug-cc-pVTZ levels. Ar ligands bind weakly at the C(3) axis on opposite sides to Si(2)H(6)(+) with only a minor impact on the Si(2)H(6)(+) properties. The calculations reveal a low-energy H(2)SiHSiH(3)(+) isomer with C(s) symmetry and a Si-H-Si bridge, which is only ∼15 kJ mol(-1) above the D(3d) structure.
Authors:
Marco Savoca; Martin Andreas Robert George; Judith Langer; Otto Dopfer
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-17
Journal Detail:
Title:  Physical chemistry chemical physics : PCCP     Volume:  -     ISSN:  1463-9084     ISO Abbreviation:  Phys Chem Chem Phys     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100888160     Medline TA:  Phys Chem Chem Phys     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany. dopfer@physik.tu-berlin.de.
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