Lead cluster lithium

Substitutions A substituent exchange has been observed on the treatment of (AlCp )4 3 with lithium bis(trimethylsilyl)amid leading to (AlCp )3[Al-N(SiMe3)2] 50 [73]. The Al-Al distances in the tetrahedron became different, with the shorter ones being to the aluminum atom that is attached to the amido group. This observation is in accordance with the bonding situation in these clusters and reflects... 

Lead and mercury are deposited as micron-sized clusters, predominantly at intercrystallite boundaries [105] so does lithium from the polyethylene oxide solid electrolyte. What is more, Li intercalates into the sp2-carbon [22, 138], Thus, observations on the Li intercalation and deintercalation enable one to detect non-diamond carbon on the diamond film surface. Copper is difficult to plate on diamond [139], There is indirect evidence that Cu electrodeposition, whose early stages proceed as underpotential deposition, also involves the intercrystallite boundaries [140], We note that diamond electrodes seem to be an appropriate tool for use in the well-known electroanalytical method of detection of traces of metal ions in solutions by their cathodic accumulation followed by anodic stripping. The same holds for anodic deposition, e.g. of, Pb as PbCh with subsequent cathodic reduction [141, 142], Figure 30 shows the voltammograms of anodic dissolution of Cd and Pb cathodically predeposited from their salt mixtures on diamond and glassy carbon electrodes. We see that the dissolution peaks are clearly resolved. The detection limit for Zn, Cd, and Pb is as low as a few ppb [143]. 

Treatment of 3-borolenes or 2-boraindans with bulky lithium amides yields the dihthiated aromatic borolide dianions, which are applicable as hgand precursors for transition-metal complexes. Many borole complexes including a number of unusual multidecker sandwich complexes and mixed-metal clusters have been described. 4 3,2i2 An unexpected new entry into the synthesis of borole complexes has been recently discovered. Bochmann found that attack of B(C6Fs)3 at a zirconium bound diene leads to a pentafluorophenylborole complex throngh snccessive C-H activation steps. ... 

The presence of lithium chloride alters the chemistry, presumably by coordination to intermediary species during cluster self-assembly. Thus, the addition of one equivalent of LiCl to 9 yields the chloride adduct 12 further treatment with one equivalent of r-butylamine leads to neutral cubane 5, but at a much reduced rate compared to the reaction without LiCl. The reaction with aniline is also retarded in the presence of LiCl, and the formation of azobenzene is significantly diminished. We have identified three products from this reaction... 

It was assumed that reactions of nickelocene with lithium - or magnesium alkyls possessing -hydrogen proceed with the formation of corresponding alkenes. The activation of the alkene by the active dinickel species (NiCp)2) formed in the reaction leads to the formation of (cyclopentadienyl)(alkylidyne)trinickel clusters. 

When 10a is reacted with Li[C6Hs-BH3] a mixture of the isomers 11c and lid (5 1 by NMR) is obtained, which could not be separated. The isomer with the phenyl group in apex position is favored, indicating that the chlorine atoms in 10a are predominantly replaced by hydrogen and the hydroboration with C6H5-BH2 leads to isomer 11c. In contrast to this the reaction of 10a with lithium durylborate yields to the cluster lie with the duryl group in basal position , lie was studied by X-ray structure analysis which confirmed the connectivities in the molecule. However, the bad quality of the crystals did not allow a reliable refinement of the structure. 

---