Synthesis, Spectroscopic Characterization and Biological Activities of Transition Metal Complexes Derived from a Tridentate Schiff Base

Table 4

Inter-molecular hydrogen bonds present in DNA-CuL₂.

Type	Donor	Donor atom	Acceptor	Acceptor atom	d (H⋯A) (Å)	D (X⋯A) (Å)	q (X−H⋯A) (^°)
C–H⋯O	CuL2	C	Thymine	O4	2.949	3.479	110
C–H⋯N	CuL2	C	Adenine	N7	2.859	3.657	129.7
C–H⋯N	CuL2	C	Adenine	N7	2.839	3.445	114.8
C–H⋯O	CuL2	C	Adenine	O2P	2.762	3.688	142.3
C–H⋯O	CuL2	C	Adenine	O1P	2.877	3.650	127.6
C–H⋯O	CuL2	C	Adenine	O2P	2.741	3.366	115.9
C–H⋯O	CuL2	C	Adenine	O5	2.459	3.351	170.3
C–H⋯N	CuL2	C	Adenine	N7	2.504	3.352	165.9
C–H⋯N	CuL2	C	Adenine	N6	2.328	2.926	114.1
C–H⋯N	CuL2	C	Adenine	N6	2.872	3.480	116.7
C–H⋯O	CuL2	C	Adenine	O1P	2.597	2.939	98.01
C–H⋯N	CuL2	C	Adenine	N6	2.810	3.262	105.8
C–H⋯N	CuL2	C	Adenine	N7	2.203	3.015	132
C–H⋯N	CuL2	C	Adenine	N6	2.192	2.951	126.8
C–H⋯N	CuL2	C	Adenine	N6	2.709	2.935	91.53
C–H⋯O	CuL2	C	Adenine	O1P	2.445	2.861	102