. 2023 Jul 10;26(9):107330. doi: 10.1016/j.isci.2023.107330

Table 2.

Details for the charge assisted NH^{+ …} O⁻ H-bonds between H₂L²⁺ cations and picrate anions in compounds 1–4

NH^{+ …} O⁻ Salt Bridge	1	2	3	4
H ^… O (Å)	1.85(2)	1.71(4)/1.69(4)	1.84(2)	1.75(2)/1.82(2)
N ^… O (Å)	2.675(2)	2.633(4)/2.624(4)	2.737(2)	2.647(1)/2.679(1)
N-H-O angle (°)	152(2)	159(4)/158(4)	156(2)	162.74(1)/165.83(1)

Values in parentheses are associated standard deviations.