Neue Cu‐Te‐Cluster

Abstract

PR,-Komplexe (R = Et, iPr, tBu) von CuCl reagieren in organischen Losungsmitteln mit Se(SiMe,), unter Abspaltung von Me,SiCI zu metallreichen Kupferclustern. Beispiele hierfur sind die Komplexe A-D['].

Syntheses and Structures of Niobium Copper Chalcogenido Clusters: [Cu4Nb6Se12O(PMe3)10][Cu4NbSe4Cl2(PMe3)4]⋅ 1.5 DMF, [Cu4Nb2Se6(PMe3)8], (NEt4)[Cu6Nb2S6Cl5(PEt3)6], and [Cu6NbTe3(Te2)2(PEt3)6][CuCl2] This work was supported by the Deutsche Forschungsgemeinschaft and the Fonds der Chemischen Industrie.

“…0.066 g, ca. [13,14] The reaction of The reaction mixture was then filtered, and the reddish black filtrate was reduced to half the volume in vacuum.…”

“…In 3, the Nb atoms have the formal charge v, and the NbÀNb distance is very large (377.5(2) pm). This was also observed in other tellurium-bridged compounds such as [Cu 23 Te 13 (PiPr 3 ) 19 ] [13] (253 and 284 pm). However, most of them are complexes of Nb III featuring a metal ± metal bond between the Nb centers.…”

New CuTe Clusters

“…The Cu, Te, and P atoms are labeled only with blue, red, and green numbers, respectively. Important distances in pm (20.5pm): 6: 6,7,9,10,[12][13][14][15][16]18,27,5,8,15,8,12,17,18,22,9,11,13,16,19,24,25) define a distorted, Frank-Kasper polyhedron with a central Te 1 with 28 triangular faces, which are occupied by twelve Cu atoms Cu6,Cu7,Cu9,CulO, coordinated to PPhEt, and 16 peripheral Te ligands, which also describe a Frank-Kasper polyhedron, which is strongly distorted because of the Te-Te bonds (Te-Te 287.9(3)-469.8(7) pm). The Cu-Cu distances vary greatly and are between 238 (2) and 31 1.5 pm.…”

“…respectively. Important distances in 2 in pm ( + 1 pm): Te4-Cu 254-300, (pc,-Te)-Cu 253-284, (pc,-TekCu 259-290; Cu-Cu distances about the Cu atoms (2, 5,8): 254-263, about the Cu atoms (1.4,6,7,10,12,13,16,20,22): 251 -298; about the Cu atoms (17,19,23): 252-273; about the Cu atoms (3, 15, 18): 252-276. about the Cu atoms (9, 11, 21): 258-297, and about the Cu atom(14): 257-298.…”

Photochemistry and Photoelectrochemistry of Quantized Matter: Properties of Semiconductor Nanoparticles in Solution and Thin‐Film Electrodes

“…A wide variety of nanometer-sized particles has been prepared up to the gram scale via colloid chemistry, either homogeneously dispersed in solution or embedded in solid matrices and glasses, in micelles, vesicles, and Langmuir-Blodgett films. Synthetic inorganic cluster chemistry has made remarkable progress in preparing relatively "large" and well-defined metal and semiconductor clusters such as [Au,,(PP~,),,,]~+ [l], Cu,,Se,,(PEt,),, [2], and Cd&4(SC6H& DMF, [3]. Gas-phase cluster physics succeeded in the preparation of large clusters of various materials in supersonic beams, and sophisticated techniques allow detailed investigations of their electronic and structural properties; the isolation of c 6 , from carbon vapor even started the new branch of fullerene chemistry.…”