Characterization of silicon-carbon clusters by infrared laser spectroscopy: the nu 3(sigma u) band of linear Si2C3

J Chem Phys. 1994 Dec 15;101(12):10237-41. doi: 10.1063/1.467904.

Abstract

The nu 3(sigma u) fundamental vibration of 1 sigma g+ Si2C3 has been observed using a laser vaporization-supersonic cluster beam-diode laser spectrometer. Forty rovibrational transitions were measured in the range of 1965.8 to 1970.9 cm-1 with a rotational temperature of 10-15 K. A least-squares fit of these transitions yielded the following molecular constants: nu 3(sigma u)=1968.188 31(18) cm-1, B"=0.031 575 1(60) cm-1, and B'=0.031 437 4(57) cm-1. These results are in excellent agreement with recent Fourier transform infrared (FTIR) measurements of Si2C3 trapped in a solid Ar matrix [J. Chem. Phys. 100, 181(1994)] and with ab initio calculations [J. Chem. Phys. 100, 175 (1994)] which suggest cumulenic-like bonding for Si2C3, analogous to the isovalent C5 carbon cluster.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Argon
  • Astronomy / methods
  • Carbon / chemistry*
  • Carbon Compounds, Inorganic*
  • Chemical Phenomena
  • Chemistry, Physical
  • Lasers*
  • Silicon Compounds / chemistry*
  • Spectrophotometry, Infrared / methods*

Substances

  • Carbon Compounds, Inorganic
  • Silicon Compounds
  • Argon
  • Carbon
  • silicon carbide