Gold complexes cyclopentadienyl

CjHjS, Thiophene, tetrahydro-gold complexes, 26 85-87 C4H,NO, 2-Propenamide, 2-methyl-nickel complex, 26 205 C4H1()02, Ethane, 1,2-dimethoxy-solvates of chromium, molybdenum, and tungsten carbonyl cyclopentadienyl complexes, 6 343 tungsten complex, 26 50 ytterbium complex, 26 22 C4H i02.NaC5H5, Ethane, 1,2-dimethoxy-compd. with cyclopentadienylsodium, 26 341... 

The preparation of two cyclo-octatetraene-gold complexes, (ct)AuCl and (cot)-AU2CI4, has been reported. The structures of biscyclo-octatetraenyl complexes of titanium, vanadium, thallium, and uranium, were deduced from their i.r. spectra. Protonation of (p-cyclo-octatetraene) (p-cyclopentadienyl) complexes has been studied. For the ruthenium and osmium complexes protonation occurs on the eight-membered ring to give CgH moiety co-ordinated to the metal atom via both an T -alkyl and an olefin-metal bond. For the cobalt and rhodium complexes a bicyclic cation (287) is produced which undergoes isomerization to the monocyclic (288). ... 

Gold(I) forms simple cyclopentadienyl compounds as well as more complex species involving 3-center 2-electron (3c-2e) bonds, and these together with analogous 3c-2e arylgold(I) compounds are discussed here. 

In the same manner, a number of alkyl (43), vinyl (69, 203), aryl (204), and cyclopentadienyl (98, 100-102) complexes of gold(I) are cleaved by halogens to yield the corresponding gold(I) halides and the halo-substituted organic species. 

The types of compounds formed by gold(I) and gold(III) often differ from those of other metals due to the constraints imposed by coordination number and electron count at the metal. Thus, for example, whereas 7r-bonded cyclopentadienyl complexes of palladium and platinum are numerous (336), and a copper(I) species of this type is known (337), cyclopentadienyl complexes of univalent (94, 96, 97) and trivalent (228) gold have invariably been found to be fluxional behavior, similar to that in dicyclopentadienylmercury, was involved (228). 

Alkenylboron compounds cyclopropanations, 9, 181 haloetherification, 9, 182 hydrogenation and epoxidation, 9, 182 metal-catalyzed reactions, 9, 183 metallic reagent additions, 9, 182 via radical addition reactions, 9, 183 5-Alkenylboron compounds, cross-coupling reactions, 9, 208 Alkenyl complexes with cobalt, 7, 51 with copper, 2, 160, 2, 174 with Cp Re(CO) (alkene)3 , 5, 915-916 with dicarbonyl(cyclopentadienyl)hydridoirons, 6, 175 with gold, 2, 255... 

Aminoalkenes, oxidative cyclization, 10, 710-711 Aminoalkoxides, on zinc compounds, 2, 371 a-Aminoalkylallenes, cycloisomerizations, 10, 720 a-Aminoalkylcuprates, preparation, 9, 519-520 -Aminoalkylidynes, diiron carbonyl complexes with cyclopentadienyl ligands, 6, 248 Aminoalkynes, hydroamination, 10, 717 a-Aminoallenes, activation by gold, 9, 574 Amino r]5-amides, in Ru and Os half-sandwich rf3-arenes,... 

Several metallocene complexes of cobalt and rhodium have been studied in which one cyclopentadienyl ring is replaced by a diborole moiety133. Under suitable conditions, auration of the C-2 carbon atom occurs (equation 29). Cyclopentadienyl and related gold(I) complexes are given in Table 5. 

---