
TY  - JOUR
A1  - Mandal, SK 
A1  - Woon, TC 
A1  - Thompson, LK 
A1  - Newlands, MJ 
A1  - Gabe, EJ 
T1  - Binuclear Copper(II) Complexes of Some Tetradentate Pyridyl Phthalazine Ligands. Structure, Electrochemistry and Magnetism - Crystal-Structure of Aqua-µ-[1,4-Di-(4',6'-Dimethylpyridin-2'-Ylamino)-Phthalazine-N<sup>1'</sup>,µ-N<sup>2</sup> ,µ-N<sup>3</sup>,N<sup>1'</sup>']-µ-Hydroxo-Dinitratodicopper(II) Nitrate
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1986
VL  - 39
IS  - 7
SP  - 1007
EP  - 1021
KW  - 
UR  - https://doi.org/10.1071/CH9861007 
N2  - The molecular structure of aqua-&#956;-[1,4-di(4&#8242;,6&#8242;-dimethylpyridin-2&#8242;- ylamino )phthalazine-N1&#8242;,&#956;-N2,&#956;-N3,N1&#8242;]-&#956;- hydroxo-dinitratodicopper (II) nitrate has been determined by single-crystal X-ray diffractometry . The compound is triclinic, space group P&#299; , with two molecules in the unit cell of dimensions a 7.8064(11), b 12.9137(14), c 14.8564(14), &#945; 69.857(8), &#946; 80.074(10), &#947; 83.659(11). The structure was refined by least-squares to a residual of 0.057 for 2806 reflections. The binuclear centre in the complex involves a five-coordinate and a tetragonally distorted six-coordinate copper atom, each with a coordinated, bidentate nitrate, a copper-copper separation of 3.156 &#506; and a Cu-O(H)-Cu bridge angle of 113.7&#176;. This complex, and other related systems, exhibit low room-temperature magnetic moments (< 1.2 BM), suggesting antiferromagnetically coupled binuclear copper centres , and in the case of the complex [Cu2( paps )(OH)Cl3].3H2O variable- temperature magnetic data indicate moderately strong exchange with -2J = 432 cm-1. Very high redox potentials are observed for these complexes [0.00-0.83 V (v. s.c.e .)] involving two-electron transfer in one step or two separate steps. 
ER  -

