Synthesis and crystal structure of Co(PO3OH) · H2O

Abstract

Abstract Syntheses under moderate hydrothermal conditions yielded single crystals of the compound Co(PO3OH) · H2O: a = 15.956(3) Å, c = 7.703(2) Å, space group R[unk], Z = 18. The crystal structure was determined from 932 X-ray reflections with sinθ/λ ≤ 0.70 Å−1; Refinement gave R = 0.032. Slightly distorted CoO6 octahedra (Co – O from 2.052(2) to 2.174(2) Å, 〈2.111 Å〉) share two common O – O edges resulting in helical ∞ 1[CoO4] rows parallel to [001]. These rows are interconnected by protonated phosphate tetrahedra. Within the phosphate tetrahedron the P – O distance to the hydroxyl group is 1.585(2) Å, the three other P – O distances range from 1.519(2) to 1.530(2) Å. The hydrogen bonds line the surface of unoccupied channels of diameter 4.63 Å running in [001]; O – H … O range from 2.654(4) to 2.720(5) Å.