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Bis[bis(dibutylamino)methylen]hydrazine  8  is prepared from  N,N,N′,N′- tetrabutylchloroformamidinium chloride ( 4c ) and hydrazine. Bromine transforms  8  to the heterocyclic guanidinium salt  15a  which is isolated as tetraphenylborate. From  N,N,N′,N′- tetraalkylchloroformamidiniumchlorides and ethylendiamine the diguanidines are prepared which are alkylated to give diguanidinium salts, From these salts guanidinium salts can be prepared by anion metathesis with tetraphenylborate-, iodide-, hexafluorphosphate-, trifluoromethansulfonat-, bis(trifluormethansulfonyl)imide and tricyanmethanide as counteranions. The structure of the compounds  15  and  17b  is confirmed by crystal structure analyses.

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Orthoamide und Iminiumsalze, IC. Synthese und Reaktionen von  N,N,N′,N′,N′′- Pentaalkyl- N′′ -[2-( N,N,N′,N′,N′′- pentaalkylguanidinio)ethyl]-guanidiniumsalzen