cis isomers of 2-catecholboryl-1-pinacolboryl-and bis(1,2pinacolboryl)-1,2-bis[4-(trifluoromethyl)phenyl]ethene substitute one another isomorphously in a 1:1 ratio. The molecule has no crystallographic symmetry, with one olefinic site shared equally between superimposed pinacol-and catecholboryls, a
MO and vibrational normal coordinate calculations of 1,1,4,4,-tetramethyl-1,4-diazonia-2,5-diboratacyclohexane
β Scribed by T.H. Hseu
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 304 KB
- Volume
- 53
- Category
- Article
- ISSN
- 0022-2860
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π SIMILAR VOLUMES
study ( < -30"C)1111. This is best evidenced by the upfield shift of protons H' (by 23Hz) and H5 (by 32Hz) on going from ( 3 ) to ( 5 ) , which simply reflects the increased availability of the lone pair for limited delocalization but is clearly inconsistent with the development of the diamagnetic r
The vibrational spectrum of 1,2,5-telluradiazole is investigated in the 400&50 cm-' region by i.r. and Raman spectroscopy. Infrared spectra of solid samples are also measured at 10 K. A satisfactory assignment of all the fundamentals is obtained by employing a valence force field which provided a c