Cobalt(II) sodium dihydrogenphosphite monohydrate

Abstract

CoNa(H2PO3) 3.H20, M r : 342.88, orthorhombic, Pbca, a = 9.054 (2), b = 14.706 (3), c = 14.759 (3) A, V--1965.1 (7) A 3, Z = 8, D x = 2.32, D m = 2.30 Mg m -3,/z(Mo Ka) = 2.38 mm-l; R = 0.046 (R w = 0.072) for 1980 observed counter reflections. The structure contains three crystallographically non-equivalent HPO a tetrahedra. The hydrogen bonds give rise to a three-dimensional network in which the Co and Na atoms are surrounded by octahedra of O atoms. min -1. The scanning interval was 1 °. 162 reflections were classified as unobserved [I < 1.96trl(I), where 31(I ) was derived from counting statistics]. Data were corrected for Lorentz and polarization effects and for absorption (pr --0.83). Transmission factors varied between 0.30 and 0.32. The density was determined pycnometrically in xylene at 298 K.

Diammonium tris[hexaaquacobalt(II)] tetrakis[hydrogenphosphate(III)], (NH4)2[Co(H2O)6]3(HPO3)4

“…The average Co-O distance in (NH 4 ) 2 [Co(H 2 O) 6 ] 3 -(HPO 3 ) 4 is 2.093 (2) Å , comparable to the average Co-O distances of 2.112 Å reported for Co(HPO 3 )ÁH 2 O (Sapina et al, 1989), 2.143 Å for Co 11 (HPO 3 ) 8 (OH) 6 (Marcos et al, 1993) or 2.101 Å for NaCo(H 2 PO 3 ) 3 ÁH 2 O (Kratochvíl et al, 1982).…”

Sodium magnesium tris(dihydrogenphosphite) monohydrate, NaMg(H2PO3)3·H2O

“…NaM(H 2 PO 3 ) 3 ÁH 2 O, with M = Mn (Chmelikova et al, 1986), and M = Co (Kratochvõ Âl et al, 1982), and NaZn(H 2 PO 3 ) 3 ÁH 2 O (Ouarsal et al, 2002). NaM(H 2 PO 3 ) 3 ÁH 2 O, with M = Mn (Chmelikova et al, 1986), and M = Co (Kratochvõ Âl et al, 1982), and NaZn(H 2 PO 3 ) 3 ÁH 2 O (Ouarsal et al, 2002).…”

Performance evaluation of phosphite NaCo(H2PO3)3·H2O as a corrosion inhibitor for aluminum in engine coolant solutions

“…The mixture was stirred for six hours and then allowed to stand for two weeks at room temperature. The crystal structure of NaCo(H 2 PO 3 ) 3 $H 2 O, from single crystal data, has been determined by Kratochvil et al 14 The sample was characterized by high precision powder X-ray diffraction (XRD), using a Panalytical diffractometer operating with CuKa radiations.…”