Metal binding to N(9), N(7), and N(3) of adenine. Crystal structure of μ-(adeninato-N3,N7,N9)tris(methylmercury(II)) perchlorate
- 15 July 1980
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 58 (14) , 1439-1443
- https://doi.org/10.1139/v80-226
Abstract
The title compound belongs to space group P.hivin.1 with the following cell parameters: a = 6.304, b = 11.925, c = 25.946 .ANG., .alpha. = 85.76, .beta. = 89.78, .gamma. = 83.57.degree. and Z = 4. The structure was solved by the heavy-atom method and refined on 2570 non-zero reflections to an R factor of 0.044. In the 2 crystallographically independent [Adeninato(CH3Hg)3]2+ ions, methylmercury groups are linearly bonded to N(3), N(7) and N(9) of a deprotonated adenine ring, forming Hg.sbd.N bonds of normal lengths (average, 2.08 .ANG.) for 2-coordinated Hg. Of the complex cations, 1/2 are associated in a dimeric unit by a pair of strong N(6).sbd.H(6).cntdot..cntdot..cntdot.N(1)H-bonds, while the others are packed as individual species in the crystal. The structure is stabilized by contacts between Hg and perchlorate oxygens.Keywords
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