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• W2072137095 abstract "Abstract The series of complexes [HgX 2 (C 5 H 4 NCOOR)] (XCl, Br or I; RMe, Et, Pr n , Pr i ) has been obtained by the addition reaction of esters of 2-pyridinecarboxylic acid to mercury(II) halides irrespective of the ester to metal molar ratio used. The X-ray crystal structures of the four chloro complexes [HgCl 2 (C 5 H 4 NCOOR)], R&.zdbnd;Mc ( 1 ), Et ( 4 ) and Pr n ( 7 ) and Pr i ( 10 ), have been determined. There is a remarkable structural variety within such a closely related family, probably due to different sizes of the substituents. Complexes 1 and 4 adopt polymeric structures. However, the one-dimensional chain in 1 consists of consecutive symmetrically bridged Hg(μ-Cl) 2 Hg dimeric units linked by secondary Hg…Cl interactions while in 4 it is formed by monomeric HgCl 2 L units, LC 5 H 4 NCOOEt, bound by a unique non-plana bis(chloride) asymmetric Hg 2 Cl 2 bridge. In both structures, mercury achieves an effectove six-coordination. The structures of 7 and 10 comprise only discrete centrosymmetric dimers and tetramers, respectively. The latter can be described as a central ClLHg(μ-Cl) 2 HgLCl unit, LC 3 H 4 NCOOPr n , bound to two additional HgCl 2 L molecules by means of long-range Hg·.Cl interactions. Mercury shows an effective five-coordination in 7 and five-and six-coordination in 10 . The four structures, based on a backbone containing mercury and chlorine atoms exclusively, have been correlated. The geometric parameters of their basic Hg(μ-Cl) 2 Hg structural motifs are also found in other HgCl 2 (L) adducts and seem to be independent of the coordination number and geometry about mercury as well as of the unidentate or bidentate nature of the L ligand." @default.
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• W2072137095 date "1997-12-01" @default.
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• W2072137095 title "Mercury(II) halide adducts of esters of 2-pyridinecarboxylic acid. Crystal structures and structural variations within the series [HgCl2(C5H4NCOOR)], RMe, Et, Prn, Pri" @default.
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• W2072137095 doi "https://doi.org/10.1016/s0020-1693(97)05537-0" @default.
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