Semi-vacant Wells-Dawson anions. Synthesis of tri-tungsten-vacant derivatives and crystallographic studies of [alphabetabetaalpha-(Cu(II)OH2)2(Cu(II))2(AsW15(OH2)3(OH)O52)2]12-.
The tri-tungsten-vacant polyoxometalate, [alpha-AsW15(OH)4O52]13-, derived from the semi-vacant Wells-Dawson complex [alpha-AsW18(OH)4O58]7-, reacts with the late-transition metal cations, Cu(II) or Zn(II), to form sandwich-type species; the X-ray crystal structure of [alphabetabetaalpha]-(Cu(II)OH2)2(Cu(II))2(AsW15(OH2)3(OH)O52)2]12-, prepared by the acidification of [alphabetabetaalpha]-(Cu(II)OH2)2(Cu(II))2(AsW15(OH)4O52)2]18-, reveals that the missing heteroatoms are distal to the central Cu4 unit and the vertices of the vacant tetrahedron are occupied by one OH- and three OH2 groups.
Mbomekalle
Israel Martyr
IM
Laboratoire de Chimie Physique, UMR 8000, CNRS, Universite Paris-Sud, 91405, Orsay, France.
Keita
Bineta
B
Nadjo
Louis
L
Hardcastle
Kenneth I
KI
Hill
Craig L
CL
Anderson
Travis M
TM