T. Mak, Wai-Hing Yip, C. Kennard
1990
Citations
0
Influential Citations
7
Citations
Journal
Australian Journal of Chemistry
Abstract
The crystal structures of the mercury(II) and thallium(1) complexes with (2-chlorophenoxy)acetic acid have been determined by X-ray diffraction, and refined to residual values R 0·040 and 0·060 for 1130 and 1612 observed reflections respectively. caterta-[Bis((2- chlorophenoxy)acetato)mercury(II)] is monoclinic, space group Cc with Z 4 in a cell of dimensions a 25 ·449(7), b 7 · 335(2), c 10 · 154(1) A, β 112·83(2)°. Mercury is bonded linearly to two carboxylate oxygens [Hg-O, 2·02(1), 2·04(1) A; O-Hg-O, 175-5(6)°] and forms a polymer link to a third oxygen [Hg-O, 2·60(2) A; O-Hg-O, 88·8(6), 87·6(7)°] giving triangular coordination about the mercury. The complex adduct ((2-chlorophenoxy)acetato)thallium(i)-(2- chlorophenoxy)acetic acid is monoclinic, space group C2/c with a 27·97(1), b 4·798(1), c 13·389(6) A, β 94β23(3)° and Z 4. This is an example of an ML.LH compound, having twofold rotational symmetry with the acid proton not located. The Tl-0 bonds to each ligand molecule are 2β826(7) A with two longer bonds to adjacent carboxylate oxygens [3β002(7) A] completing a distorted square-planar stereochemistry about thallium. This results in a linear polymer structure.