Group-IB halides

Fig. 1. Chalcogenide halides in ternary systems having the components the Group IB elements Cu, Ag, and Au, the chalcogens S, Se, and Te, and the halogens Cl, Br, and I, They are indicated as M , Y, and X ", respectively. (Redrawn from A. Rabenau, H. Rau, and G. Rosenstein, J. Less-Common Metals 21, 395 (1970), Fig. 4, p. 401.)...

The formation of boron-group IB bonds succeeds in two ways by transfer of a boryl group from metal-boron compounds to other metals, and by reaction of anionic boranes or carboranes with transition-metal halides. 

The synthesis of compounds containing boron-group IIB bonds also occurs by two pathways. The most convenient method is using anionic borane or carboranc species, as in the group-IB case, to react with Zn, Cd, or Hg halides. Moreover, reactions between organometallic compounds (Zn, Cd) with unchanged boranes arc also realized, so Zn and Cd decaboranes, e.g., MB H 2 n solvent (M = Zn, Cd), result from reactions of decaborane(14) with MRj . 

These reactions give products similar to those described in 8.3.2.1. Transition-mclal hydrido complexes react with a halogen derivative of a group-IB metal to form a hydrogen halide and the required metal-metal bond ... 

Elastic-inelastic collision model, Szilard-Chalmers reaction and, 1 269 Electrical conduction, in organic superconductors, 29 278-286 Electrical conductivity of chalcogenide halide compounds, 23 331 of Group IB, 23 337-339, 342, 346-349 photoelectric effects, 23 368, 410 semiconductors, 23 368, 390, 395-396, 400-402, 410-412 superconductors, 23 375-377 of graphite intercalation compounds, 23 290, 294, 309-310, 312, 317-318 Electric discharges arc type, 6 146-147 chemical reactions in, 6 189-191 chemical reactions in, 6 143-206... 

Oxadiazole and its dervatives soluble in water form addition compounds with certain inorganic salts which precipitate from concentrated aqueous solutions of the respective salts. In particular, the halides of the metails of groups IB and IIB as well as those of Pt, Pd, precipitate adducts containing the metal and oxadiazole in 1 1 ratio. Under anhydrous conditions also adducts of AICI3 or BF3 were obtained (55b). 

Group IB -Gold. The neutral Au(I) complexes RAuL (R = alkyl, L = trialkyl or triarylphosphine) undergo two-electron oxidative additions with alkyl halides ... 

Yam and Lo (Chap. 2 ) focus on the photophysics of a broad family of supramolecular metal complex clusters derived from the group Ib transition metal ions (Cu, Ag, and Au). This chapter discusses basic types of excited states found in clusters that contain two, three, and four metal ions held together by ligands such as halide, phosphine, and acetylide. Continuing on this theme are S. W. Jones and cowoikers (Chap. 4), who outline the photophysical and electrochemi-... 

Oxidative addition of organic halides to low-valent metal complexes generates reactive metal alkyls that can then be used in insertion, coupling, carbonylation-decar-bonylation and cyclization reactions for organic synthesis. These transformations can be made catalytic after development of the stoichiometric chemistry using the more stable metal alkyls. This section surveys the reactions of alkyl, aryl and acyl halides with transition metal complexes of the groups IIIA (lanthanides and actinides), IVA-VIII and IB. 

The neutral phosphonate esters, D(EB)[(EB)P], D(4-MPe-2)[BP], D(4-MPe-2)[(iB)P] and D(4-MPe-2)[PP] were prepared by the Michaelis-Arbuzov Reaction in which alkyl halides were reacted with previously prepared trialkyl phosphites. The neutral phosphate, T(4-MPe-2)P, was prepared by a conventional esterification method in which 4-methyl-2-pentanol was reacted with POCI3 in the presence of pyridine. The temperature during the reaction was kept below 15°C to prevent disproportionation of the alkyl group. The neutral phosphinate ester, B[DBP], was prepared by esterification of dibutyl phosphorus oxychloride, (C Hg)2P0C1, in the presence of pyridine. 

A benzyl halide solid support If (Table 1) has been reported [77] that affords anchoring groups which are less labile than trityl anchors Ib-le but more labile than anchors to chloromethyl-PS (la). Resin If has been used to prepare amides and sulfonamides by reaction with an amine followed by acylation or sulfonylation, respectively, and cleavage using 95% TFA. When the same reaction sequence was conducted on an analogous resin Ig prepared from Tentagel AC (acid-cleavable linker), the products could be cleaved under milder conditions (5% TFA) because of the greater stability... 

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