
TY  - JOUR
A1  - Taylor, D 
T1  - Coordination compounds of Hg<sub>2</sub><sup>2+</sup>: The crystal structure of Tetrakis-(4-benzylpyridine)dimercury(I) perchlorate
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1977
VL  - 30
IS  - 12
SP  - 2647
EP  - 2654
KW  - 
UR  - https://doi.org/10.1071/CH9772647 
N2  - Crystals of tetrakis(4-benzylpyridine)dimercury(I) perchlorate, [Hg2(C12H11N)4]2, (ClO4)2, are monoclinic,a 11.729(1) &#506;, b 10.896(1) &#506;, c 18.392(2) &#506;, &#946; 96.20(1)°, space group P21/c with Z = 2 dimeric formula units. The structure was solved from three-dimensional diffractometer data (2744 independent reflections) by Patterson and Fourier techniques. Block-diagonal least-squares refinement of all non-hydrogen atoms converged at R 0.039, Rw 0.053. The mercury atoms in the centrosymmetric cation are three-coordinate with Hg-Hg 2.5084(7), Hg-N 2.227(7), 2.476(7) &#506;. The Hg-Hg-N angles are 153.9° and 118.4° respectively. The perchlorate ions span the Hg-Hg bond with long Hg-O contacts of 2.899 and 3.026 &#506;. This is a new structural type for dimercury(1) coordination compounds. The distortion of the usually linear L-Hg-Hg-L system with the increase in coordination number of the mercury atoms appears to be related to the stability of dimercury(I) complexes with moderately basic N-donor ligands. 
ER  -

