Charge-Transfer Complexes of 3a,6a-Diaza-1,4-Diphosphapentalenes With the Organic π-Acceptor 2,3-Dicyanopyrazine and Its Derivatives.
2,3-Dicyanopyrazine (DCNP) was first utilized as a π-acceptor to form charge-transfer complexes with strong π-donors, 3a,6a-diaza-1,4-diphosphapentalenes (RR'DDP), bearing peripheral methyl and annelated cyclohexyl substituents. The donor and acceptor molecules form mixed D-A-D-A stacks irrespective of the component ra...