Croatica Chemica Acta, Vol. 57 No. 4, 1984.
Original scientific paper
Crystal Structure and Infrared Spectra of Anhydrous (Adeninato)methylmercury(II)
Jean-Pierre Charland
; Departement de Chimie, Univ ersite de Montreal C.P. 6210, Succ. A , Montreal, Quebec, CANADA H3C 3V1
Andre L . Beauchamp
; Departement de Chimie, Univ ersite de Montreal C.P. 6210, Succ. A , Montreal, Quebec, CANADA H3C 3V1
Abstract
The title compound, C6H7HgN5, belongs to the orthorhombic
space group Pbcn, a == 14.658(8), b == 8.407(5), c == 13.006(9) A, Deal = 2.898 g cm-3, Z == 8 molecules per cell. The structure was refinedon 1132 unique nonzero reflections to R == 0.026. The crystal containsthe same type of 1 : 1 monomeric molecule as the monohydrat in which the CH3Hg group is bonded to the N(9) position of deprotonated adenine. These molecules are associated into infinite ribbons by means of two pairs of complementary N-H ... N bonds involvingboth amino protons and the lone pairs on N(l) and N(7) of
each molecule. The infrared spectra of this material and of the
monohydrate differ almost exclusively in the regions related to
NH2 vibrations. This simply results from differences in hydrogen-
bonding patterns and no direct metal-amino interaction is taking
place in any case. The spectral changes already identified as characteristicof N(9)-complexation for the monohydrate are also observed for the anhydrous compou nd.
Keywords
Hrčak ID:
194138
URI
Publication date:
20.10.1984.
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