Ammine complexes Complex species that metal ions

Ammine complexes Complex species that contain ammonia molecules bonded to metal ions. 

This, together with the known tendency of metal ions to form mixed hydroxy-am-mine complexes, snggested to them that two ammonia molecnles were involved in the first step and that the adsorbed species in Reaction (3.58) was a hy-droxy-ammine species, viz. Cd(OH)2(NH3)2. Decomposition of the hydroxide-ammine-thiourea complex was then assumed to occur by nucleophilic attack of an ammonia species on the S=C bond of the thiourea. 

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