A. Johnson, Lynne A. O'Connell, M. Clarke
Aug 15, 1993
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0
Influential Citations
11
Citations
Journal
Inorganica Chimica Acta
Abstract
Pentaammineosmium(III) coordinates to both the N7 and C8 positions of purine rings. The compound 7-[9MeHyp(NH 3 ) 5 Os]Cl 3 ·H 2 O crystallizes in the orthorhombic space group Pnma (No. 62) with the unit cell parameters: a =11.542(2), b =6.9841(8), c =21.960(3) A and Z =4. The compound 8-[1,3,7Me 3 Xan(NH 3 ) 5 Os]Cl 3 ·2H 2 O crystallizes in the monoclinic space group P 2 1 / c (No. 14) with the unit cell parameters: a =7.1228(X), b =14.613(1), c =19.667(1) A, β=91.782(9)° and Z =4. The OsC bond in the latter structure is 2.039(9) A and the imidazolylidine ligand exerts a slight trans influence seen in the lengthening of the OsN ax distance (2.172(8) A) by about 0.05 A relative to the average of the equatorial OsN eq value of 2.123(8) A. The spectroscopic, electrochemical and structural properties of these and additional N-bound purine complexes are compared with those of similar N7 and C8 ruthenium(III) species.