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N–H(N)…S Bonding in Tetrahedral [Zn(NCS)2L]0 Complexes (L = MexH2–xN(CH2)2NH2–yMey, x, y = 0 – 2)

✍ Scribed by Elinor M. Cameron; William E. Louch; T. Stanley Cameron; Osvald Knop

Publisher: John Wiley and Sons
Year: 1998
Tongue: German
Weight: 292 KB
Volume: 624
Category: Article
ISSN: 0372-7874
DOI: 10.1002/(sici)1521-3749(199810)624:10<1629::aid-zaac1629>3.0.co;2-x

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✦ Synopsis

The crystal structures of uncharged tetrahedral dithiocyanato zinc complexes with N-methylated ethylenediamines have been determined with a view to a study of intermolecular hydrogen-bonding interactions in these compounds. It is found that the H(N) hydrogen atoms are exhaustively engaged in N±H(N) . . . S bonds. The majority of these bonds are branched (bifurcated or trifurcated), and the hydrogen-bond systems they form all contain one of the two characteristic primitive core motifs: either a discrete centrosymmetric [ . . . S . . . H . . . ] 2 dimer or an infinite [ . . . S. . . H . . . ] ∞ helix about a 2 1 or pseudo-2 1 axis. The hydrogen bonding is analyzed in detail, with particular attention to the existence of correlations between the N±H(N)±S angles and the H(N) . . . S distances as well as between the corresponding N±H(N)±S/H(N) . . . S pairs in the bifurcated N±H(N) . . . 2 S bonds.

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