How is [4-([4-(Dimethylamino)phenyl]{4-[ethyl(dimethyl)ammonio]phenyl}methylene)-2,5-cyclohexadien-1-ylidene](dimethyl)ammonium bromide chloride dichlorozinc (CAS: 7114-03-6) typically synthesized?

The compound is typically synthesized through a multi-step process involving the formation of a cyclohexadienylidene complex, followed by the introduction of the dimethylammonium, bromide, chloride, and dichloro-zinc functionalities. Commonly used catalysts include Lewis acids, and the reaction conditions are optimized for yield and selectivity, often requiring precise control of temperature and pressure.