T w o isomers of each of a-P,S,Sel, and a-P,SSe,l, have been identified by ,'P and "Se NMR spectroscopy in mixtures made by direct combination of the elements. The same compounds were formed as a result of a photochemical redistribution reaction between a-P, S, I , and a-P, Se, I , in solution in CS, . Systematic changes in chemical shifts and in coupling constants with alterations in molecular geometry, as sulfur was replaced by selenium in the series a-P, S, I , 1a-P,S,Sel ,

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Phosphorus I 0063Facile Routes to Sodium Tetradecaphosphide Na 4 P 14 and Molecular Structure of Na4(DME)7.5P14 and Na4(en)6P14 (DME = 1,2-Dimethoxyethane; en = Ethylenediamine). -The structures of title compounds (III) (triclinic, space group P1, Z = 2) and (V) (monoclinic, P21/c, Z = 2) are determined by single crystal XRD. The anion in both compounds consists of two nortricyclane P7 cages which are connected by a P-P bond. DME in (III) acts as chelating solvent resulting in discrete Na4(dme)8P14 molecules and Na4(dme)7P14 chains, whereas the en molecules in (V) act exclusively as non-chelating, bridging molecules forming a three-dimensional Na4 (en)6P14 network. -(MILUYKOV*, V.; KATAEV, A.; SINYASHIN, O.; LOENNECKE, P.; HEY-HAWKINS, E.

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Glass and Compounds in the System P4S4-As4S4-As4Se4-P4Se4 -(determination of glass forming regions and glass temp. by thermoanalytical and X-ray methods and detection of all molecules of the series P4-nAsnS4 and As4S4-nSen (n = 0, 1, 2, 3, 4) by 31P NMR and/ or mass spectroscopy). -(BLACHNIK, R.; LOENNECKE, P.; NUSS, J.