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The PH 3 -containing complex [(CO) 4 W(PH 3 ) 2 ] (1) is synthesized in good yields by the "one-pot" reaction of [(CO) 4 W(nbd)] (nbd = norbonadiene) with P(SiMe 3 ) 3 and subsequent methanolysis of the reaction mixture. The further reaction of [(CO) 4 W(PH 3 ) 2 ] with [Co 2 (CO) 8 ] results in three novel cobalt clusters, [Co 8 (CO) 18 ( μ 6 -P) 2 ( μ-CO)] (2), [Co 10 (CO) 18 ( μ 7 -P) 2 ( μ-CO) 6 ] (3), and [[Co 3 (CO) 8 -{μ 4 -PW(CO) 5 }][( μ 4 -P)Co 3 (CO) 9 ]] (4). All products have been comprehensively characterized including X-ray diffraction.

0.7). -As revealed by single crystal XRD, Ag5Te1.7Se0.3Cl crystallizes in the tetragonal space group I4/mcm with Z = 4 and Ag5Te1.9Se0.1Cl in the monoclinic space group P21/n with Z = 8 at 298 K. The α-β-phase transition temperature of ion conducting Ag5Te2Cl is lowered by partial substitution of Te by Se. The stabilization of the α-Ag 5 Te 2 Cl structure type in Ag 5 Te 2-y Se y Cl around room temperature results in an increase of conductivity of more than two orders of magnitude compared to the ternary phase. The combination of high conductivities for the high temperature phases and the ability to choose a defined transition temperature makes the title system a promising candidate for room temperature as well as low temperature applications such as thermal sensors or electronic switches. -(NILGES*, T.; DREHER, C.; HEZINGER, A.; Solid State Sci. 7 (2005) 1, 79-88; Inst. Anorg. Anal. Chem.,