364048-57-7Relevant academic research and scientific papers
Lanthanide nitrate complexes of diphenylmethylphosphine oxide: Synthesis and spectroscopic studies. Crystal structures of [La(Ph2MePO)3(NO3)3], [La(Ph2MePO)4 (NO3)3]·xMe2CO and [Yb(ph2MePO)4(NO3)2] PF6
Bosson, Matthew,Levason, William,Patel, Tajesh,Popham, Michael C,Webster, Michael
, p. 2055 - 2062 (2001)
The reaction of Ln(NO3)3·6H2O (Ln = lanthanide except Pm) with Ph2MePO in a 1:3 or 1:4 ratio in acetone or ethanol produces [Ln(Ph2MePO)3(NO3)3] which have been characterised by analysis, IR, 1H and 31P{1H} NMR spectroscopy and conductance measurements. The [Ln′(Ph2MePO)3(NO3)3] (Ln′= Pr-Tb) exist only as tris complexes in solution and are unaffected by the presence of excess Ph2MePO. In contrast the [Ln″(Ph2MePO)3(NO3)3] (Ln″ = Ho-Lu) partially decompose in CH2Cl2 solution into [Ln″(Ph2MePO)4 (NO3)2]+, and [Ln″(Ph2MePO)4 (NO3)2] PF6 are readily isolated from Ln″(NO3)3, Ph2MePO and NH4PF6 in acetone. For lanthanum only, a neutral 1:4 complex [La(Ph2MePO)4(NO3)3] was isolated. X-ray crystal structures show that [La(Ph2MePO)3(NO3)3] contains nine-coordinate La, whilst [La(Ph2MePO)4 (NO3)3]·xMe2CO contains a ten-coordinate metal centre. The structure of [Yb(Ph2MePO)4 (NO3)2]PF6 reveals an eight-coordinate cation and all complexes contain bidentate nitrato-groups.
