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A study of the electronic properties of M(CO)4DAB (M = Cr, Mo, W; DAB = diazabutadiene). II. Conformational change below 200 K as evidenced from absorption and resonance raman spectra

✍ Scribed by L.H. Staal; A. Terpstra; D.J. Stufkens

Publisher: Elsevier Science
Year: 1979
Tongue: English
Weight: 449 KB
Volume: 34
Category: Article
ISSN: 0020-1693
DOI: 10.1016/s0020-1693(00)94684-x

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✦ Synopsis

The resonance Raman and electronic absorption spectra of M(CO)JIAB (M = Cr, MO, W; DAB = 1,4-Diazabutadiene) in alkane solutions or glasses at temperatures below 200 K indicate the existence of a second isomer in which the M(CO), moiety has a pseudo C,, symmetry. In polar solvents a continuous shift of the CT band is found when the temperature is lowered. This thermochromism is caused by an increase of the solvatochromism at low temperature.

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✍ R.W. Balk; D.J. Stufkens; A. Oskam 📂 Article 📅 1979 🏛 Elsevier Science 🌐 English ⚖ 641 KB

## The magnetic circular dichroism (MCD) together with the electronic absorption spectra of MOMpyridine-2_carbaldehyde-(Nghenyl)-imine revealed that the first MO to L CT band consists of different electronic tmnsitions which could beassigned with the help of resonance Raman spectra. The excited stat