
TY  - JOUR
A1  - Canty, AJ 
A1  - Minchin, NJ 
A1  - Patrick, JM 
A1  - White, AH 
T1  - Coordination chemistry of dimethylgold(III) and methylmercury(II). Synthesis, <sup>1</sup>H N.M.R. and structural studies of Poly(pyrazol-1-yl)borate complexes
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1983
VL  - 36
IS  - 6
SP  - 1107
EP  - 1113
KW  - 
UR  - https://doi.org/10.1071/CH9831107 
N2  - Dimethylgold(III) and methylmercury(II) form complexes Me2AuL and MeHgL where L are poly-(pyrazol-1-yl)borate ligands [HB(pz)3]- and [B(pz)4]-. The structure of Me,Au{HB(pz)3} has been determined by single-crystal X-ray diffraction at 295 K and refined by least-squares methods to R 0.056 for 2194 independent 'observed' reflections. This complex has square-planar coordination for the gold atom involving two coordinated pyrazole rings and one uncoordinated ring, in contrast to the isoelectronic cation [Me2Au{(pz)3CH)]+ which has square planar coordination with a weak axial Au . .N interaction. Variable temperature 1H n.m.r. spectra in CD2Cl2 indicate presence of rapid equilibria between pyrazole ring environments at ambient temperature and, for the MeHgII complexes, down to -90ºC. For the Me2AuIII complexes spectra at -90ºC indicate presence of pyrazole ring environments in ratios 2 : 1 (L = [HB(pz)3]-) and 2 : 1 : 1 (L = [B(pz)4]-). Crystal data for Me2Au{HB(pz)3}: rhombohedral, space group R3c, a 17.98(1) Å, &#945; 117.98(5)º, Z 18. 
ER  -

