catena-Bis(phosphinato)(2,2'-bipyridyl)manganese(II)

Abstract

(A) and angles (o)

The crystal structures of manganese(II) phosphinate monohydrate, zinc phosphinate monohydrate, and anhydrous zinc phosphinate

“…Refinement with unit weights converged at R = 0.080 for MPM (1553 data, 147 parameters), R = 0.051 for ZPM (960 data, 73 parameters), and R = ZP, Zn(HzPO2)2, orthorhombic, Pmma, a = 6.482 (7), b -= 5.363 (4), c = 7.436 (9)/k,Z= 2, Dx= 2.52 Mg m -3, F(000) = 192,/t(Cu K¢~) = 11-7 mm-L Equi-inclination Weissenberg photographs (Cu radiation, 2 = 1.5418 A,) of levels hO-7l and hk0-2 for MPM, O-5kl and hO-5l for ZPM, and hO-31 and hk0-6 for ZP were scanned by the SRC Microdensitometer Service, Rutherford Laboratory. Each data set was corrected for absorption; however, for ZPM this made x y z Mn (1) 4778 (2) 1083 (3) 8262 (2) Mn (2) 3950 (2) 2461 (3) 5736 (2) P (1) 2814 (3) 4279 (5) 7440 (3) P (2) 4182 (3) 2366 (5) 496 ( (6) 5286 (7) -256 (11) 3362 (7) 0 (7) 637 (7) 1355 (13) 1241 (7) 0(8) 1167 (7) 2301 (14) 3137 (8) Aq(l) 2156 (7) 1602 (12) 5178 (8) Aq (2) 3295 (7) 4876 (11) 5097 (8) (Williams, 1966;Matsuzaki & Iitaka, 1969;Galign6 & Dumas, 1973;Weakley, 1978). The ability of the O-P-O angle to vary favours the bridging role of H2PO ~.…”

“…The structures of crystalline phosphinic acid, H2PO(OH) (Williams, 1966), and Ca(H2PO2) 2 (Loopstra, 1958) have been determined by neutron diffraction, and those of a number of phosphinates by X-ray diffraction: Mg(H2PO2)2.6H20 (Galign~ & Dumas, 1973), CaNa(H2PO2) 3 (Matsuzaki & Iitaka, 1969), Mn(bpy)(H2PO2) 2 (Weakley, 1978), and Ln(H2POz)3.H20 (Ln = La, Eu) (Ionov, Aslanov, Rybakov & Porai-Koshits, 1973a,b). In the lanthanide salts, the coordination number of eight for Ln 3+ is achieved by coordination of the water as well as by participation of the anion in both Ln-O-Ln and Ln-O-P-O-Ln bridges.…”

Chloro(phosphinato)germanium(II) and chloro(phosphinato)tin(II)

“…Introduction. While studying the structural role of the phosphinate ('hypophosphite') anion, H2PO 2, in crystals (Weakley, 1978a(Weakley, ,b, 1979 we noted that although [GeCI(H2PO2)] and [SnCI(H2PO2)] were first prepared in the 1950's (Everest, 1951(Everest, , 1952) their structures had not been reported. Although the structural chemistry of Sn H is extensive (Zubieta & Zuckerman, 1978) there has been far less work on Ge n. The procedures of Everest (1951Everest ( , 1952 gave satisfactory crystals which were mounted on glass fibres and protected by a light coating of epoxy cement.…”

“…The data reduction for both compounds was repeated with inclusion of an absorption correction when it had become clear that these formulae were correct. The structures were solved by the heavy-atom (Weakley, 1978a(Weakley, ,b, 1979. The nearest neighbours of each M atom (two O atoms and one C1) define the base of a trigonal pyramid.…”

Structure of 2,2'-bipyridyl(iminodiacetato)oxovanadium(IV) dihydrate, C14H13N3O5V.2H2O

“…This distortion has the effect of pushing atoms N(1) and N(2) towards the metal atom and the angles N(1)-C(5)--C(6) and N(2)-C(6)-C(5) are ~ 115 ° while the angles C(4)-C(5)-C(6) and C(5)-C(6)-C(7) are ~ 124 °. Similar angular configuration is quite common in the bipyridyl ligand (Camus, Marsich & Nardin, 1977;Weakley, 1978;Endres, Keller, Moroni, N6the & Dong, 1978;Harrison & Hathaway, 1978) and may be attributed to the steric repulsion between the overcrowded hydrogen pair H(4) and H(7). The non-bonded distance between these two is 2.03 A.…”