TY - JOUR
T1 - Structural and vibrational characteristics of the tetrasulfatodimolybdenum ions with MoMo bond orders of 3.5 and 4.0
AU - Bino, Avi
AU - Albert Cotton, F.
AU - Marler, David O.
AU - Farquharson, Stuart
AU - Hutchinson, Bennett
AU - Spencer, Billy
AU - Kincaid, James
PY - 1987/10/15
Y1 - 1987/10/15
N2 - The compound K4[Mo2(SO4)4]Br·4H2O has been made and its crystal structure determined. Space group P4/mnc; unit cell dimensions, a = 11.903(2), c = 8.021(1) Å, V = 1136(1) Å3. The compound is isomorphous with the analogous chloride whose structure has been reported. The MoMo and MoBr distances are 2.169(2) and 2.926(1) Å, respectively and the [Mo2(SO4)4] 3- ions reside on crystallographic special positions with 4/m symmetry. The Raman spectra of both the bromo and chloro compounds have been measured and the MoMo stretching frequency is 370 ± 1.5 cm-1 in each, for the compounds containing the natural isotopic distribution of molybdenum. The chloro compound has been prepared containing the pure isotope 92Mo as well, and the Raman spectra recorded. The v(MoMo) band is shifted by 6.8 ± 0.5 cm-1. The compound K4[Mo2(SO4)4]·2H2O has also been prepared with Mo at natural abundance and with the pure isotope 100Mo, whereby a shift of 8.5 ± 0.5 cm-1 was found. These and other results will be discussed with regard to the similarity of the Raman spectra of the Mo2(S04)43- and M02(S04)44- species.
AB - The compound K4[Mo2(SO4)4]Br·4H2O has been made and its crystal structure determined. Space group P4/mnc; unit cell dimensions, a = 11.903(2), c = 8.021(1) Å, V = 1136(1) Å3. The compound is isomorphous with the analogous chloride whose structure has been reported. The MoMo and MoBr distances are 2.169(2) and 2.926(1) Å, respectively and the [Mo2(SO4)4] 3- ions reside on crystallographic special positions with 4/m symmetry. The Raman spectra of both the bromo and chloro compounds have been measured and the MoMo stretching frequency is 370 ± 1.5 cm-1 in each, for the compounds containing the natural isotopic distribution of molybdenum. The chloro compound has been prepared containing the pure isotope 92Mo as well, and the Raman spectra recorded. The v(MoMo) band is shifted by 6.8 ± 0.5 cm-1. The compound K4[Mo2(SO4)4]·2H2O has also been prepared with Mo at natural abundance and with the pure isotope 100Mo, whereby a shift of 8.5 ± 0.5 cm-1 was found. These and other results will be discussed with regard to the similarity of the Raman spectra of the Mo2(S04)43- and M02(S04)44- species.
UR - http://www.scopus.com/inward/record.url?scp=0542396376&partnerID=8YFLogxK
U2 - 10.1016/S0020-1693(00)87782-8
DO - 10.1016/S0020-1693(00)87782-8
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:0542396376
SN - 0020-1693
VL - 133
SP - 295
EP - 300
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 2
ER -