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Bis(trifluoromethyl)mercury(II) Complexes with Purine and 3, 5‐Dimethyl‐4′‐amino‐triazole as Ligands, [Hg(CF 3 ) 2 (Pur)] 4 and [Hg(CF 3 ) 2 (Dat)] 2 . Bis(trifluormethyl)quecksilber(II)‐Komplexe mit Purin und 3, 5‐Dimethyl‐4′‐amino‐triazol als Liganden: [Hg(CF 3 ) 2 (Pur)] 4 and [Hg(CF 3 ) 2 (Dat)] 2
Author(s) -
Nockemann Peter,
Schulz Frank,
Naumann Dieter,
Meyer Gerd
Publication year - 2005
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200400376
Subject(s) - chemistry , triclinic crystal system , monoclinic crystal system , stereochemistry , molecule , crystallography , crystal structure , trifluoromethyl , denticity , medicinal chemistry , alkyl , organic chemistry
Colourless single crystals of [Hg(CF 3 ) 2 (Pur)] 4 and [Hg(CF 3 ) 2 (Dat)] 2 were obtained from aqueous and etheric solutions of the respective components Purine, (imidazo[4, 5‐d]pyrimidine, Pur ), 3, 5‐dimethyl‐4′‐amino‐triazole ( Dat ) and bis(trifluoromethyl)mercury(II), Hg(CF 3 ) 2 . [Hg(CF 3 ) 2 (Pur)] 4 crystallizes with the tetragonal system (P‐4, Z = 8, a = 1486.8(2), c = 1026.2(1) pm, R all = 0.0657) with tetrameric molecules consisting of four purine molecules bridged by slightly bent Hg(CF 3 ) 2 molecules forming a cage with the CF 3 ligands surrounding this cage. The two modifications of [Hg(Dat)(CF 3 ) 2 ] 2 (I: 170 K, triclinic, P‐1, Z = 2, a = 814.9(2), b = 845.4(2), c = 968.4(3) pm, α = 106.55(2)°, β = 103.41(2)°, γ = 110.79(2)°, R all = 0.1189; II: monoclinic, P2 1 /c, Z = 8, a = 879.8(2), b = 1731.0(3), c = 1593.9(3) pm, β = 106.89(2)°, R all = 0.1199) both contain dimeric molecules that are stacked parallel to one crystal axis to strands which are arranged in a parallel fashion in I and rotated against each other in II by 110°. In both, the tetrameric [Hg(CF 3 ) 2 (Pur)] 4 and the dimeric [Hg(CF 3 ) 2 (Dat)] 2 the Hg(CF 3 ) 2 molecules are slightly bent (around 167 and 170°) and rather weakly attached to the N‐donor ligands Pur and Dat with Hg‐N distances around 272 pm, although in both cases the Hg atoms bridge between two ligand molecules.