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Platinum(II) complexes with 2,2′-bipyrimidine, [PtX2(bipym)](X = CN, Cl, or SCN; X2= C2O4), [Pt(bipym)2]-[PtX4](X = Cl or CN), and [Pt2(NH3)4(bipym)][NO3]4, have been synthesised and characterised. Intense absorption bands in the visible region assigned to metal–metal interactions are related to strong hydrogen bonding involving the unco-ordinated heterocyclic nitrogen atoms.
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Kiernan et al. (1978) studied this question.
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