Dichloromethane liquid temperature range

The auto-ignition temperatures of various halogenated hydrocarbons in presence of chlorine are considerably below the corresponding values in air. Examples are (in °C) chloromethane 215 (618 in air) dichloromethane 262 (556) 1,2-dichloropro-pane 180 (555°C). Flammability limits are usually wider in chlorine than in air. Gaseous mixtures of chloromethane and chlorine are detonable in the range 12.5— 55% [1]. Liquid mixtures of dichloromethane and chlorine may well also be detonable [2]. 

Many of the methods that were previously employed for Mn(OAc)3-medi-ated radical reactions involved the use of acetic acid as a solvent. Because of the poor solubility of Mn(OAc)3 in organic solvents and the need for high temperatures for many reactions, the use of acetic acid limited the range of substrates that could be employed. In order to overcome this drawback, Parson investigated an elegant way of using ionic liquids to establish milder reaction conditions in Mn(OAc)3-mediated reactions.2 It was shown that ionic liquids, such as l-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]), which is miscible with polar solvents (e.g. methanol, dichloromethane) could be used in Mn(OAc)3-mediated radical reactions. 

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