TY - JOUR
T1 - The preparation and structures of group 12 (Zn, Cd, Hg) complexes of the soft tripodal ligand hydrotris(methimazolyl)borate (Tm)
AU - Cassidy, I.
AU - Garner, M.
AU - Kennedy, A.R.
AU - Potts, G.B.S.
AU - Reglinski, J.
AU - Slavin, P.A.
AU - Spicer, M.D.
PY - 2002/5
Y1 - 2002/5
N2 - Complexes of the hydrotris(methimazolyl)borate ligand (Tm) have been prepared with zinc, cadmium and mercury halides. Complexes of type [M(Tm)X] were obtained and characterised by NMR and mass spectrometry, X-ray crystallographic analysis of [Zn(Tm)X] (X = Cl, Br, I) reveals a symmetrical coordination mode of the ligand, but no significant change with different halides, which sit on the approximate C-3 axes of the complexes, The structures of [M(Tm)Br] (M = Cd, Hg) are isomorphous with one another, Again, the ligand is symmetrically coordinated to the metal, but the halide is now significantly displaced from the approximate C-3 axis of the M(Tm) unit, resulting in what approximates to a trigonal pyramidal geometry. Unlike in most distorted mercury structures, little bond length expansion (towards two- or three-coordinate geometries) occurs. This is ascribed to the strong affinity of the thione donors for Hg.
AB - Complexes of the hydrotris(methimazolyl)borate ligand (Tm) have been prepared with zinc, cadmium and mercury halides. Complexes of type [M(Tm)X] were obtained and characterised by NMR and mass spectrometry, X-ray crystallographic analysis of [Zn(Tm)X] (X = Cl, Br, I) reveals a symmetrical coordination mode of the ligand, but no significant change with different halides, which sit on the approximate C-3 axes of the complexes, The structures of [M(Tm)Br] (M = Cd, Hg) are isomorphous with one another, Again, the ligand is symmetrically coordinated to the metal, but the halide is now significantly displaced from the approximate C-3 axis of the M(Tm) unit, resulting in what approximates to a trigonal pyramidal geometry. Unlike in most distorted mercury structures, little bond length expansion (towards two- or three-coordinate geometries) occurs. This is ascribed to the strong affinity of the thione donors for Hg.
KW - tripodal ligands
KW - N ligands
KW - S ligands
KW - group 12 complexes
UR - http://dx.doi.org/10.1002/1099-0682(200205)2002:5<1235::AID-EJIC1235>3.0.CO;2-6
U2 - 10.1002/1099-0682(200205)2002:5<1235::AID-EJIC1235>3.0.CO;2-6
DO - 10.1002/1099-0682(200205)2002:5<1235::AID-EJIC1235>3.0.CO;2-6
M3 - Article
SN - 1434-1948
VL - 2002
SP - 1235
EP - 1239
JO - European Journal of Inorganic Chemistry
JF - European Journal of Inorganic Chemistry
IS - 5
ER -