Complexes of lanthanide dithionates 2. Electrospray mass spectrometry of Ln(2)(S2O6)(3) and their Ph3PO complexes; the X-ray crystal structure of Pr-2(S2O6)(3)(Ph3PO)(6)(H2O)(6)
Awg. Platt et al., Complexes of lanthanide dithionates 2. Electrospray mass spectrometry of Ln(2)(S2O6)(3) and their Ph3PO complexes; the X-ray crystal structure of Pr-2(S2O6)(3)(Ph3PO)(6)(H2O)(6), INORG CHIM, 295(2), 1999, pp. 146-152
The crystal structure of Pr-2(S2O6)(3)(Ph3PO)(6)(H2O)(6) (1), has been dete
rmined and is compared with the previously reported Nd-2(S2O6)(3)(Ph3PO)(4)
(H2O)(8) (2), and Nd-2(S2O6)(3). 14H(2)O (3). The steric congestion in the
primary coordination sphere, evaluated by steric angle sum (SAS) calculatio
ns, shows that all the complexes have SAS values within the expected range
for the coordination number of the metal. The incorporation of extra Ph3PO
in 1 is accommodated by a very long Pr-OH2 distance. The behaviour of lanth
anide dithionates and their triphenylphosphine oxide complexes under electr
ospray mass spectrometry conditions has been investigated. For Ln(2)(S2O6)(
3), the expected ions, Ln(S2O6)(+) and Ln(S2O6)(2)(-), and their methanol s
olvates, are observed as weak signals. The relationship between these and t
he major ions observed in the gas phase is discussed. The spectra of the tr
iphenylphosphine oxide complexes show no lanthanide containing ions. (C) 19
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