Organometallic compounds thiols

The reaction of elemental sulfur with organometallic compounds is one of the standard methods of synthesis of thiols [3, 4], In this way, the ortho lithiation of lithium benzenethiolate led to the preparation of 1,2-benzenedithiol (1), and a convenient one-pot procedure which can be used on a large scale was worked out [5]. 

The isocyanate group is very reactive and will condense with other active compounds containing hydrogen, like amines and thiols. Products resulting from such reactions, respectively, are the ureas and thiocarbamates. With amines the rate of reaction is somewhat faster than with hydroxyl compounds, while that with thiols is slower. However, a wide variety of catalyst systems (many based on amines and organometallic compounds) is available for the acceleration of isocyanate reactions. 

Excitation to the LC states may also result in population of the CT-excited states, especially the LLCT states. These phenomena are frequently encountered in complexes containing both rc-acceptor (eg 1,10-phenantroline or 2,2 -bipyridyl) and 7r-donor ligands (eg aromatic thiols). Then the LC excitation can induce charge transfer between these ligands through central atom (LLCT) that leads to a photoredox reaction. Such reactions were reported in the case of heteroleptic organometallic compound [Rh CylLXCsHs)]3 [37], heteroleptic Re1 complex fac-[Re (L)(CO)3(bpy)]n+ [46] and metal-carbon-bonded platinum complexes [47]. 

Benzenesulfonylquinazolin-4(l//)-ones 1 react smoothly with a series of nucleophilic compounds, namely water, alkoxides, thiols, and organometallic compounds, to afford quinazo-line-2,4(117,3//)-dione and 2-substituted quinazolin-4(l//)-ones (NB tautomerism, cf. PP 13,51). 

Thio and thiol substituents Reactions with dipolarophiles Atropisomeric 1,2-dithiole-3-thiones Reactions involving organometallic compounds... 

A discussion of reactions of mono- and polychalcogen organometallic complexes as well as conversions of a number of thiol-containing organometallic compounds is presented in this section. A synthetic method developed independently by Herrmann et al. (282) and Herberhold et al. (283) enabled the synthesis of thio-, seleno-, and telluroformaldehyde complexes 510 and 511, by the addition of methylene to metal-bonded chalcogens (509) (Table V). 

Transition-metal NPs are easily prepared by the simple reduction of metal compounds or the decomposition of organometallic compounds in the zero oxidation state dissolved in the imidazolium ILs (Scheme 6.1 and Table 6.1). FunctionaUzed imidazoUum or pyridinium ILs such as those containing thiol, alcohol or cyano groups have also been used for the formation and stabilization of Ni, Ag and Au NPs [61-75], Bimetallic nanorods, hyperbranched nanorods, and NPs with different CoPt compositions have also been easily prepared in BMl.NTf2 [76]. 

Since thiols are acid compounds (hydrosulfuric acid derivatives), mercaptides can also be obtained by reacting them with organometallic compounds [Clegg et al., 1995 Anderson et al 2003] ... 

Fig. 12. Reaction of organometallic compounds with nucleophilic sites (H-Nu) of the microbial cell. In this way organometallic compounds interfere with a large number of cell processes. For example, the reaction with essential thiol groups leads to the inhibition of enzymes. However, amines, amides, amino acids and sulphur-free proteins are nucleophilic reaction partners for organometallic compounds, too the corresponding reactions cause disturbances of many kinds in the metabolism of the microbe cell.

PBE dendrons coordinate to the surface of II-VI semiconductor nanocrystals (e.g., CdSe [33] and CdSe/ZnS core/shell structure [34, 35]) to modulate the photoluminescence of the nanocrystals [32]. Trioctylphosphine oxide (TOPO)-capped II-VI semiconductor nanocrystals of several-nanometers diameter have been synthesized by a pyrolysis reaction of organometallics in TOPO [33-35]. The capping ligand (TOPO) can be replaced by stronger ligands such as thiol compounds [36], suggesting that dendrons bearing sulfur atom(s) at the focal point replace TOPO as well. 

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