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Pregled bibliografske jedinice broj: 257770

Low-temperature Raman study of bis(trimethylsilyl)acetylene


Mohaček Grošev, Vlasta; Furić, Krešimir
Low-temperature Raman study of bis(trimethylsilyl)acetylene // Book of Abstracts of the XXVIII European Congress on Molecular Spectroscopy / Akyuz, Sevim ; Akalin, Elif (ur.).
Istanbul: Istanbul University, 2006. str. 142-142 (poster, međunarodna recenzija, sažetak, znanstveni)


Naslov
Low-temperature Raman study of bis(trimethylsilyl)acetylene

Autori
Mohaček Grošev, Vlasta ; Furić, Krešimir

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts of the XXVIII European Congress on Molecular Spectroscopy / Akyuz, Sevim ; Akalin, Elif - Istanbul : Istanbul University, 2006, 142-142

Skup
European Congress on Molecular Spectroscopy (28 ; 2006)

Mjesto i datum
Istanbul, Turska, 03.-08.09.2006

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Raman; phonons; methyl group; bis(trimethylsilyl)acetylene

Sažetak
Low temperature Raman spectra of a known catalyst bis(trimethylsilyl)acetylene (BTMSAC) were recorded in temperature interval from 323 K to 10 K. Below melting point which occurs at 276 K BTMSAC crystallizes in P21/c space group with Z=2. Altogether six phonons are expected below 100 cm-1, together with two internal modes linear angle bending at 40 cm-1 and Si(CH3)3 torsion which is practically free in liquid, but hindered in polycrystalline state [1]. Above 100 cm-1 there is a degenerate linear bending mode at 127 cm-1, three modes (SiC3 sym. def. mode, CH3 torsion A and B type [1], and CH3 sym. torsion) at 175 cm-1, three internal modes at 216 cm-1 (two SiC3 deformation, and one degenerate CH3 torsion). It is interesting to note that the triple stretching vibration occuring at 2108 cm-1 is asymmetric in crystalline state, the low wavenumber side of the bandwidth being considerably larger than the high wavenumber part of the asymmetrically constructed Lorentzian [2]. [1] V. A. Sipachev, L. S. Khaikin, O. E. Grikina, V. S. Nikitin, M. Traetteberg: J. Mol. Struct. 523 (2000) 1-22. [2] V. Mohaček-Grošev, K. Furić: Fizika A 14 (2005) 219-224.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
0098019
0098022

Ustanove
Institut "Ruđer Bošković", Zagreb