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Investigation of a mercury(II) carbene complex: bis(1,3-dimethylimidazol-2-ylidene) mercury chloride

✍ Scribed by Anthony J. Arduengo III; Richard L. Harlow; William J. Marshall; T. K. Prakasha

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 489 KB
Volume: 7
Category: Article
ISSN: 1042-7163
DOI: 10.1002/(sici)1098-1071(199611)7:6<421::aid-hc4>3.0.co;2-b

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✦ Synopsis

The reaction of I,3-dimethylimidazolium chloride with Hg(O,CCH,), afforded a bis(carbene)mercuty (II) complex (2), which is characterized by multinuclear N M R spectroscopy (IH, 13C, 15N, and 199Hg) and by single-crystal X-ray analysis. As a consequence of chloride-ion interaction with the mercury center, the C,-Hg-C, angle in 2 is reduced to 161.4 (3)" compared to its near-linear value in complex 4 that contains perchlorate counterions.

The C, resonance in the mercury complex 2 moves tipfield by 36.96 ppm relative to the parent carbene (2),, with a large lJHgC = 2741.18 Hz.

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