Abstract
Reaction of Hg(C 4H 6NO) 2 (where C 4H 6NO is the anion of 2-pyrrolidinone) with thorium nitrate in methanol yields a polymeric heterometallic complex, [Hg 2Th(C 4H 6NO) 4(NO 3) 4] n which has been characterized by X-ray diffraction. The crystals are monoclinic, P2 1/ c, a = 10.020(5), b = 19.421(10), c = 14.615(6) Å, β = 94.97(4)°, Z = 4. The structure was refined on 2570 reflections to R = 0.047. The compound has a polymeric chain structure with the links of the chain comprising 16-membered macrocycles, formed by two thorium, two mercury, four oxygen, four carbon and four nitrogen atoms. Each thorium atom is 10-coordinate with a distorted bicapped square antiprismatic array of oxygen atoms (four from 2-pyrrolidinone anions, four from two bidentate nitrates and two from two unidentate nitrates).
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