Phosphoryl Complexes of Beryllium(II)

Abstract

A number of phosphoryl solvates and adducts of beryllium(II) tetrafluoroborate and nitrate is reported. The infrared and Raman spectra of these complexes have been investigated. The anion vibrations in both solvates and adducts are assigned and discussed. The beryllium‐oxygen stretching vibrations of the solvates are assigned and compared to those reported for other complexes. An assignment for the more complicated adduct spectra is attempted.

Synthesis, spectroscopic studies and structural systematics of phosphine oxide complexes with Group II metal (beryllium–barium) nitrates

“…We recently reported studies of a series of homoleptic cations with phosphine oxides and diphosphine dioxides, 5 ) and [Be(OPPh 3 ) 2 (NO 3 ) 2 ] have been reported with limited characterisation. 6,7 In the present paper we extend these studies to the complexes of the three phosphine oxides OPPh 3, Ph 2 P(O)CH 2 P(O)Ph 2 , and o-C 6 H 4 (P(O)Ph 2 ) 2 with the nitrates of Be-Ba. Nitrate coordinates readily to hard metal ions and a rich chemistry of Sc, Y and lanthanide nitrates with phosphine oxides has been described [8][9][10][11] which also provide comparison data for the present study.…”

“…12 The reaction of aqueous Be(NO 3 ) 2 with OPPh 3 in a 1 : 2-4 ratio in methanol in the presence of 2,2-dimethoxypropane as dehydrating agent, followed by recrystallisation from acetone afforded colourless crystals of [Be(OPPh 3 ) 2 (NO 3 ) 2 ]. The complex was previously described by de Bolster, 6 although only analytical and IR/Raman data were reported. The structure consists of discrete molecules with Be in a four-coordinate environment formed from two phosphine oxides and two monodentate nitrate ligands (Table 1 and Fig.…”