Halogens, labile bonded

The 3-mercapto-1,2-dithiolium salts (39a) also suffer deprotonation on addition of water. This behavior is the basis of a simple and effective method of purification, which is particularly useful for aryl-substituted trithiones. 48 The tendency towards charge neutralization in the alkylmercapto-1,2-dithiolium ions is also the reason for the relative ease of removal of the alkyl group (cf. thermal dealkylation, transmethylation), as well as for the extremely labile bonding of other groups such as acyl—, —S02—, —SO—, —S2C1, and halogen to the exocyclic S atom of the corresponding 3-mercapto-1,2-dithiolium derivatives. 

The role of the initiator in metal-catalyzed living radical polymerization is to form an initiating radical species via homolytic cleavage of its labile bond such as C—halogen by the metal catalysts. In most cases,... 

Metal-halogen bonds are more labile than meial-mirogen bonds. Use this informal ion and ihe Lrans effect to devise syntheses for the following geometric isomers from [PtCUl2-... 

Chlorination of the Si—H bond with weak chlorinating agents such as CCh or CHC13 appears feasible if the Si atoms of the Si—H bond can be further bonded to at least two other Si atoms. The IR valence frequency of the Si—H bond is found to be mostly under 2100 cm-1. This reaction procedure turned out to be effective for halogenation of labile compounds65,265, 3S0,604. ... 

Because both donor acceptor and boron-halogen bonds are labile in many adducts, donor-for-halogen exchange is possible giving ionic adducts of 1 1 stoichiometry ... 

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