Partial paramagnetism of the chromium-chromium quadruple bond
作者： F. Albert Cotton , Hong Chen , Lee M. Daniels , Xuejun Feng
DOI: 10.1021/JA00049A031
关键词: Boltzmann distribution 、 Quadruple bond 、 Nuclear magnetic resonance spectroscopy 、 Chemistry 、 Chromium 、 Stereochemistry 、 Paramagnetism 、 Inorganic compound 、 Ground state 、 Bond length 、 Crystallography
摘要: Variable-temperature NMR measurements show that Cr 2 (O CR) 4 L compounds (L=MeOH, H O, py, MeCN) and closely related ones possess inherent, temperature-dependent partial paramagnetism. This may be attributed to a Boltzmann distribution between ground state with S=0 low-lying (∼400-1000 cm -1 ) S=1
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