Structure of bis(μ3-phenylimido)-tris(tricarbonyliron)(2Fe–Fe), [Fe3(C6H5N)2(CO)9]

o"05 ~5c2e" 9 c2A" ~B" /c3,"~) NIB" Ol (~ N~) 033"'--,,,,,~N 3"?24" Fig. 1.Schematic drawing of the dimer (projection along c).Adjacent pairs of alanyl moieties are mutually perpendicular and are in cis configuration, while the alanyl N atoms are in trans configuration.The centre of inversion lies between the two Cu atoms.The four carboxyl O atoms and an axial water O coordinate with Cu to form a square pyramid.complexes (Ueki, Ashida, Sasada & Kakudo, 1968), and references cited therein), but comparable to the value of 1.975 A in bis(fl-alanine)copper(II) tetrahydrate (Kamwaya & Teoh, 1984).The angles O(1)-Cu-O(2), 0(2)-Cu-0(3), 0(3)-Cu-0(4) and 0(4)-Cu-O(1) fall within the range 82-96 ° as reported for Cu compounds by Ueki et al. (1968), while O(1)-Cu-O(3) and O(2)-Cu-O(4) are in the range 160-174 ° as summarized for Ag compounds (Rao & Viswamitra, 1972, and references cited therein).Angles O(1)-C(1A)-O(3*) [125.8(1)°] and O(2)-C(1B)-0(4*) [125.0 (1) °] are larger than the values of 122.5 and 122.2 ° for analogous angles previously reported by us (Kamwaya & Teoh, 1984).