The hydrogen bond (NH⋯O) lengths [Å] (first row) and values of Laplacian (second row) at H-BCP and E_HB [kJ mol⁻¹] (third row).

Complex	trans		cis
	H⋯O10	H⋯O11	H⋯O10	H⋯O11
2+a	1.865	1.866	1.880	1.886
	0.0937	0.0933	0.0907	0.0897
	−31.7	−31.5	−30.2	−29.8
2+b	1.869	1.855	1.879	1.867
	0.0926	0.0955	0.0914	0.0937
	−31.4	−32.7	−30.7	−31.6
2+c	1.852	1.847	1.870	1.860
	0.0956	0.0967	0.0925	0.0946
	−32.9	−33.3	−31.4	−32.1
2+d	1.833	1.841	1.847	1.854
	0.0992	0.0976	0.0962	0.0970
	−34.8	−33.9	−33.2	−33.3
2+e	1.830	1.817	1.836	1.832
	0.0994	0.1022	0.0980	0.0997
	−35.1	−36.4	−34.2	−34.9
2+f	1.791	1.800	1.806	1.801
	0.1058	0.1064	0.1035	0.1050
	−38.8	−38.9	−37.4	−37.9
1+f−	1.721a	1.922
	0.0881	0.0853
	−56.5	−26.8

^aN⋯HO hydrogen bond.