Infrared Spectroscopic and dielectrometric investigation of the molecular geometry of isocyanato- and isothiocyanato-silane derivatives

T. Veszprémi, J. Nagy, I. A. Barta, G. Zsombok

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The molecular geometry of compounds of the series (CH3)nSi(NCX)4-n, (where n 0, 1, 2, 3 X S, O) were investigated with the objective of determining the magnitudes of the SiNC angles. Measurement of the infrared spectra and dipole moments were carried out. The infrared spectra unambiguously suggest linearity, and this is supported by dipole moment calculations. The deviation from linearity observed by electron diffraction is a consequence of shrinkage effects δ(SiNCX) resulting from low frequency, large amplitude vibrations. From the dipole moment values it is concluded that the N-Si-N angle in the di- and trifunctional isothiocyanates is larger than the tetrahedral angle. The structural differences between the silicon and carbon compounds can be attributed to (dp)π bonding in the former.

Original languageEnglish
Pages (from-to)323-334
Number of pages12
JournalJournal of Organometallic Chemistry
Volume185
Issue number3
DOIs
Publication statusPublished - Feb 12 1980

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Silicon Compounds
Isothiocyanates
Silanes
Dipole moment
Vibration
silanes
dipole moments
Carbon
Electrons
Infrared radiation
Derivatives
linearity
Geometry
infrared spectra
geometry
silicon compounds
carbon compounds
Silicon
shrinkage
Electron diffraction

ASJC Scopus subject areas

  • Biochemistry
  • Chemical Engineering (miscellaneous)
  • Inorganic Chemistry
  • Organic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Science (miscellaneous)
  • Materials Chemistry

Cite this

Infrared Spectroscopic and dielectrometric investigation of the molecular geometry of isocyanato- and isothiocyanato-silane derivatives. / Veszprémi, T.; Nagy, J.; Barta, I. A.; Zsombok, G.

In: Journal of Organometallic Chemistry, Vol. 185, No. 3, 12.02.1980, p. 323-334.

Research output: Contribution to journalArticle

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