Chlorocarbonate anion

Acyliminophosphoranes are easily accessible from lithiated triphenylimi-nophosphoranes (16), the latter being generated by lithiation of phospho-nium bromides (Scheme 9). The strongly basic iminophosphorane anion reacts either with an acyl halide (17) or a chlorocarbonate (19) to give triphenyl-A-acyliminophosphorane (18) or product (20), respectively (91S382). 

The titanium teflate anion [Ti(OTeF5)6]2 is non-basic and weakly coordinating, allowing the isolation of chlorocarbon complexes such as [Ag(Cl2CH2)2]2-[Ti(OTeF5)6].3 ... 

In solid-liquid phase transfer processes, i.e., those reactions in which a solid reagent is phase transferred by a crown [46] or occasionally by a tertiary amine, a cosolvent is ordinarily used, regardless of whether or not the substrate is a solid. In principle, any solvent which does not itself undergo reaction (unless this is the desired end) is acceptable. The most commonly used solvents for solid-liquid phase transfer processes have been benzene (and other hydrocarbons), dichloromethane and chloroform (and other chlorocarbons) and acetonitrile. The latter solvent can be successfully utilized in solid-liquid systems whereas it should be unacceptable in liquid-liquid systems because of its miscibility with water. Chloroform and dichloromethane are commonly and successfully used, although both undergo reactions the former being readily deprotonated to yield either trichloromethide anion or carbene [38], and the latter suffering nucleophilic displacement [19b, 53, 54]. 

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