Synthesis and structural characterization of seven copper(I) complexes with 3-amino-5,6-dimethyl-1,2,4-triazine and triphenylphosphine/triphenylarsine

Abstract Seven new copper(I) complexes containing 3-amino-5,6-dimethyl-1,2,4-triazine (ADMT), [Cu(μ-Cl)(ADMT)(PPh 3 )] 2 ( 1 ), [Cu(μ-NCS)(ADMT)(PPh 3 )] 2 ( 2 ), [Cu(ADMT)(PPh 3 ) 2 Cl] ( 3 ), [Cu(ADMT)(PPh 3 ) 2 Br] ( 4 ), [Cu(μ-Cl)(ADMT)(AsPh 3 )] 2 ( 5 ), [Cu(μ-Br)(ADMT)(AsPh 3 )] 2 ( 6 ) and [Cu(ADMT)(AsPh 3 ) 2 I] ( 7 ) have been synthesized by the reactions of CuX (X = Cl, Br, I, SCN) with triphenylphosphine/triphenylarsine EPh 3 (E = P for 1 – 4 ; E = As for 5 – 7 ) and ADMT in mixed solvents. Complexes 1 – 7 have been characterized by IR, NMR, luminescence, elemental analyses and X-ray diffraction. In 1 , 2, 5 and 6 , the intermolecular hydrogen bonds of type I R 2 2 (8) are formed by two N–H donors and two N atoms from two ADMT ligands. In 1 – 7, the intramolecular hydrogen bond of type II R 1 1 (6) is formed between one N–H donor from ADMT and one halide ion. In 1 , 2, 5 and 6 , the halide ions and thiocyanate ions bridge two copper atoms to form the parallelogram Cu 2 X 2 , which are further linked to form infinite zigzag chains along a -axis through the hydrogen bond of type I R 2 2 (8).