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

Complexes of the lanthanide metals (La–Nd, Sm–Lu) with hypophosphite and phosphite ligands: crystal structures of [Ce(H2PO2)3(H2O)], [Dy(H2PO2)3] and [Pr(H2PO2)(HPO3)(H2O)]·H2O

“…b See ref. 17.distance of 1.491[4] Å in this structure appears to be shorter than the 1.513[2] Å seen in [Pr(H 2 PO 2 ) 3 ], but this is to be interpreted in the light of the fact that both the co-ordination mode of the hypophosphites and the nature of the coligands is different in both structures. In the phosphite ligand the P(2)-O(23) distance is shorter than the distances to O(21) and O(22), which situation has been observed before 27,28 and is analogous to the asymmetry of the µ 3 (κ 1 ,κ 1 ,κ 1 )-hypophosphite ligands, caused by different ligating demands on the two O atoms.…”

Synthesis, Structure, and Spectroscopy of Rare Earth Hypophosphites. 1. Anhydrous and Monohydrated Lanthanide Hypophosphites

“…A range of hypophosphite complexes have previously been studied by X-rays, and it is worthwhile to summarize the structural results. In NH 4 H 2 PO 2 , KH 2 PO 2 , CaNa(H 2 PO 2 ) 3 , Mg(H 2 PO 2 ) 2 ·6H 2 O, NaH 2 PO 2 · 4 / 5 H 2 O, Zn(H 2 PO 2 ) 2 · x H 2 O ( x = 0, 1), , and Ca(H 2 PO 2 ) 2 , the hypophosphite anion moeity is characterized by a distorted tetrahedral structure, the O−P−O and H−P−H angles being larger and smaller, respectively, than 109.47°, while the O−P−H angles are close to that value. The P−O bond distances are between 1.48 and 1.52 Å.…”

“…The hypophosphite anion plays a rather different role in the structure of Mg(H 2 PO 2 ) 2 ·6H 2 O, each oxygen being hydrogen-bonded to three molecules of water of three different [Mg(H 2 O) 6 ] 2+ octahedra 1l. Zn(H 2 PO 2 ) 2 has a polymeric layer-type structure, whereas Zn(H 2 PO 2 ) 2 ·H 2 O forms a three-dimensional polymeric network, with both Zn−O−Zn and Zn−O−P−O−Zn bridges. , In anhydrous U(H 2 PO 2 ) 4 , hypophosphite anions again serve as bridging groups in linking the uranium centers to yield a three-dimensional network, but the coordination geometry of uranium is approximately square antiprismal …”

Stabilization of Hypophosphite in the Binding Pocket of a Dinuclear Macrocyclic Complex: Synthesis, Structure, and Properties of [Ni2L(μ-O2PH2)]BPh4(L = N6S2Donor Ligand)

“…[Ni 2 L(μ-O 2 PH 2 )]ClO 4 (2). To a solution of 1 (92 mg, 0.10 mmol) in methanol (30 mL) was added with stirring a solution of (nBu 4 N)-H 2 PO 2 (82.5 mg, 0.268 mmol) in methanol (5 mL) at room temperature.…”