Table 1. Calculated bond length (Å), bond angles (°) and molecular planarity parameters of all studied systems.

Complexes	Atoms	Bond length	Atoms	Bond angle	MPP
M1	C11–C12	1.383	C11–C12–C44	127.598
	C12–C14	1.771	C12–C44–C39	121.318	0.540
	C12–C44	1.468
M2	C11–C12	1.384	C11–C12–C45	127.309
	C12–C14	1.774	C12–C45–N47	121.948	0.350
	C12–C45	1.446
M3	C11–C12	1.384	C11–C12–C45	127.346
	C12–C14	1.774	C12–C45–N47	122.026	0.445
	C12–C45	1.446
M4	C11–C12	1.385	C11–C12–C45	127.378
	C12–C14	1.775	C12–C45–N47	121.989	0.432
	C12–C45	1.445
M5	C11–C12	1.396	C11–C12–C52	122.086
	C12–C14	1.777	C12–C52–C45	136.553	0.611
	C12–C52	1.440
M6	C11–C12	1.385	C11–C12–C43	127.715
	C12–C14	1.773	C12–C43–C44	122.025	0.686
	C12–C43	1.462