Diane Dickie - Yellow and blue make green: The importance of stoichiometry in the reaction of 1,4-bis(2,6-diisopropylphenyl)-1,4-diazabutadiene with dimethylgallium chloride.

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      Publication Details (including relevant citation   information): Page,Giang, Felix,Ana M., Dickie,Diane A.,   Chen,Linfeng, Kemp,Richard A., Main Group Chem.,   2010, 9 (1,2), pp 11-21

      Abstract: An unprecedented class of multichromic   single crystals has been investigated after their initial   discovery almost 15 years ago in industry. Single crystals have   been prepd. that are crystallog. identical, yet may be grown   colorless, yellow, or green from crystal to crystal, or   surprisingly, multicolored within the same crystal at all viewing   angles, where one would expect that only a single color would   exist. The system examd. consisted of Mo2GaCl complexed with   1,4-bis(2,6-diisopropylphenyl)-1,4-diazabutadiene in varying   ratios. The work described is primarily geared towards   understanding the factors leading to the multichromic nature of   the complexes. Our results indicate that the most plausible   explanation for the yellow/green mixed crystals is that the   yellow crystals are contaminated with small amts. of an   intensely-colored blue byproduct. In crystal regions where both   the yellow and blue compds. are found, the crystals appear dark   green. Identification of the blue byproduct was confirmed by   x-ray diffraction. [on SciFinder(R)]

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