Table 2. Selected Hydrogen Bond Geometry (Å) in 1, 2, and 4.

D–H···A	D···H	H···A	D···A	∠DHA
1
O7-Hc···O6	0.82(3)	1.82(3)	2.6149(18)	165(3)
O7-Hd···O6	0.82(3)	1.92(3)	2.7451(19)	177(3)
O4-Ha···O5	0.75(3)	2.03(3)	2.7749(19)	173(3)
O4-Hb···O2	0.82(3)	1.85(3)	2.6658(17)	173(3)
2
O5-Ha···O4	0.8700	2.03(2)	2.753(3)	140(3)
O1-H1a···O6	0.8700	1.895(9)	2.748(3)	166(3)
O1-H1b···O6	0.8700	1.913(7)	2.668(3)	144.4(9)
4
N1S-H1Sd···O6	0.92	1.939(14)	2.830(14)	162.4(4)
N1S-H1Se···O6	0.92	1.939(15)	2.830(14)	162.4(4)