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エチレンサルファイドの橋架けπ-結合および二酸化イオウのO・・・Oπ-結合


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Title: エチレンサルファイドの橋架けπ-結合および二酸化イオウのO・・・Oπ-結合
Other Titles: Bridged π-Bond of Ethylene Sulfide and O…Oπ-Bond of Sulfui Dioxide
Authors: 濱田, 圭之助 / 森下, 浩史
Authors (alternative): Hamada, Keinosuke / Morishita, Hirofumi / 浜田, 圭之助
Issue Date: 31-May-1990
Publisher: 長崎大学教育学部
Citation: 長崎大学教育学部自然科学研究報告. vol.43, p.11-18; 1990
Abstract: Valence considerations suggest a D2h structure with linear skelton C-S-C or a C2v stucture which has the three heavier atoms forming an isosceles triangle C-S-C for an ethylene sulfide CH2SCH2. However the obtained Raman and infrared spectra of an ethylene sulfide indicate the lack of coincidence between Raman and infrared frequencies. Therefore an ethylene sulfide should have the linear skelton C -S- C (point group D2h), where the each unpaired p-electron of two C atoms are crosslinked over the central S atom. The fact that each three bands appear in the Raman and infrared spectrum for a sulfur dioxide SO2 proves that SO2 is not a symmetrical linear molecule O-S-O (point group D∞h), but an isosceles triangle molecule O-S-O (point group C2v), where the O atoms of SO2 should be monovalent. However an O atom is normally divalent rather than monovalent, so the each unpaired p-electron of two O atoms must be considered to be linked by π-bond. This is confirmed spectroscopically, as follows; the obtained Raman and infrared spectra of SO2 show the each three fundamentals splitted due to the O…O π-bond. The infrared spectrum of ozone O3 shows the three fundamentals which are doublet respectively. This means that O3 also has same molecular structure as that of SO2.
URI: http://hdl.handle.net/10069/32358
ISSN: 0386443X
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:No. 43

Citable URI : http://hdl.handle.net/10069/32358

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