
TY  - JOUR
A1  - Harrowfield, JM 
A1  - Pakawatchai, C 
A1  - White, AH 
T1  - Dimorphism of zinc(II) dithizonate
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1983
VL  - 36
IS  - 4
SP  - 825
EP  - 831
KW  - 
UR  - https://doi.org/10.1071/CH9830825 
N2  - Zinc dithizonate, Zn(HDZ)2, HDz = C13H11N4S-, has been found to occur in two crystalline modifications, the structure of one form ('&#945;') having already been determined; its redetermination is reported here, together with that of the '&#946;' form. Crystals of the '&#945;' form are monoclinic, P21/c, a 7.887(3), b 22.40(1), c 15.324(6) &#506;, &#946; 92.82(3)&#176;, Z 4; the structure has been refined by least squares to a residual of 0.061 for 2061 'observed' diffractometer reflections. The cell dimensions of the '&#946;' form are remarkably similar, but with an interchange of axes; crystals are monoclinic, P21/c, a 7.607(2), b 15.66(1), c 2276(1) &#506;, &#946; 94.97(3)&#176;, Z 4, the structure being refined to a residual of 0.039 for 1846 'observed' reflections. The zinc environments in both structures are very similar, the zinc atoms being four-coordinate with a pair of similar N,S-chelating ligands about each. For the &#945; form, Zn-S are 2.272(3), 2.271(3) A, S-Zn-S, 130.6(1)&#176; Zn-N are 2.058(7), 2.083(6) &#176;, N-Zn-N, 107.7(3)&#176;, while the chelate N-Zn-S angles are 86.6(2), 86.8(2)&#176;, and interligand N-Zn-S, 120.6(2), 126.0(2)&#176;. For the &#176; form, Zn-S are 2.256(2), 2.270(2) A, S-Zn-S, 129.4(1)&#176;; Zn-N are 2.064(5), 2.053(5) A, N-Zn-N, 107.4(2)&#176;, while chelate N-Zn-S angles are 86.2(1), 86.5(1)&#176;, and interligand N-Zn-S, 125.0(2), 124 4(1)&#176;. 
ER  -

