The first neural trans-bis(diamino-carbene)platinum(II) complex 2 is prepared by the reaction of trans-diiodo[bis(p-tolylisocyanide)]platinum(II)1 with a secondary amine, N,N-dipropylamine, while on applying a primary amine, N-propylamine, a neutral ortho-metalled trans-bis(diamino-carbene)platinum(II) complex 3 is obtained in good yield. The structures of carbene complexes 2 and 3 have been established