Raman spectroscopy has been used to distinguish structural differences between α-12-heteropoly anions and β-12-heteropoly anions in solution. The results are consistent with the Keggin structure for the α-isomers and a modified Keggin structure for the β-isomers. Reduced 12-molybdophosphates and molybdovanadophosphates in solution have also been characterized by Raman spectroscopy; the results are consistent with a retention of the Keggin structure.
SnellF. D. and SnellC. T., Colorimetric Methods of Analysis, (van Nostrand, Princeton, NJ, 1949), 3rd ed., Vol. II, pp. 170, 196, 233, 660, 695; CharlotG., Colorimetric Determination of Elements, (Elsevier Publishing Co., New York, 1964), pp. 339–343, 370–378.
3.
TsigdinosG. A., Topp. Curr. Chem.76, 1 (1978).
4.
KegginJ. F., Proc. Roy. Soc. Lond. A.144, 75 (1934).
ThouvenotR.Rocchiccioli-DeltcheffC., and SouchayP., Compt. Rend.278C, 455 (1975).
17.
Rocchiccioli-DeltcheffC.ThouvenotR., and FranckR., Compt. Rend.280C, 751 (1975).
18.
Rocchiccioli-DeltcheffC.ThouvenotR., and FranckR., Spectrochim. Acta32A, 587 (1976).
19.
LyhamnL.CyvinS. J.CyvinB. N., and BrunvollJ., Spectrosc. Lett.9, 859 (1976).
20.
LyhamnL.CyvinS. J.CyvinB. N., and BrunvollJ., Z. Naturforsch.31A, 1589 (1976).
21.
LyhamnL. and CyvinS. J., Spectrosc. Lett.10, 907 (1977).
22.
LyhamnL.CyvinS. J.CyvinB. N., and BrunvollJ., Spectrosc. Lett.12, 101 (1979).
23.
KasprzakM. S.CrouchS. R., and LeroiG. E., Appl. Spectrosc.32, 537 (1978).
24.
TsigdinosG. A., Electrochemical Properties of Heteropolymolybdates, (Climax Molybdenum Co. Bulletin Cdb-15, 1971).
25.
TsigdinosG. A. and HalladaC. J., J. Less-Common Met.36, 79 (1974).
26.
PopeM. T. and VargaG. M.Jr., Inorg. Chem.5, 1249 (1966).
27.
RobinM. B. and DayP., Advan. Inorg. Chem. Radiochem.10, 248 (1967).
28.
PradosR. A.MeikeljohnP. T., and PopeM. T., J. Am. Chem. Soc.96, 1261 (1976).
29.
RabetteP.RoparsC., and GrivetJ. P., Compt. Rend.265C, 153 (1967).
30.
SmithD. P.SoH.BenderJ., and PopeM. T., Inorg. Chem.12, 685 (1973).
31.
AltenauJ. J.PopeM. T.PradosR. A., and SoH., Inorg. Chem.14, 417 (1975).
32.
SouchayP.TezeA., and HerveG., Compt. Rend.275C, 1013 (1972).
33.
TsigdinosG. A. in First International Conference on the Chemistry and Uses of Molybdenum Proceedings, MitchellP. C. H., Ed. (Climax Molybdenum Co., Ann Arbor, MI, 1973), pp. 39–43.
34.
El-ShamyH. K. and IskanderM. F., J. Inorg. Nucl. Chem.35, 1227 (1973).
35.
TsigdinosG. A. and HalladaC. J., Inorg. Chem.7, 437 (1968).
36.
TruesdaleV. W.SmithC. J., and SmithP. J., Analyst (London)102, 73 (1977).
37.
KieferW. and BernsteinH. J., Appl. Spectrosc.25, 500 (1971).
38.
FlynnC. M.Jr. and PopeM. T., Inorg. Chem.12, 1626 (1973).
39.
RedelK. H.SpenkuchD., and WesslerG. R., Opt. Spectrosc.38, 349 (1975).