Table 2. Hydrogen Bonds of NBBSH Compounds.

compounds	D	H	A	d(D–H) (Å)	d(H–A) (Å)	d(D–A) (Å)	D–H–A (deg)
3	C7	H7	O2	0.93	2.23	2.770 (2)	116.4
	C13	H13	O11	0.93	2.65	3.569 (3)	170.1
	N3	H1	O21	0.83 (2)	2.24 (2)	3.065 (2)	172 (2)
	1–x, −y, 1 – z
4	C6	H6	N11	0.93	2.58	3.424 (3)	150.7
	N1	H1N	O11	0.82 (3)	2.10 (3)	2.920 (2)	173 (2)
	13/2 – x, 1/2 + y, 3/2 – z
5	N1	H1N	O11	0.83 (2)	2.15 (2)	2.973 (2)	171 (2)
	C9	H9	O22	0.93	2.45	3.296 (3)	151.9
	C7	H7	O22	0.93	2.58	3.379 (3)	144.5
	1–x, 1/2 + y, 3/2 – z; 2+x, 1 + y, +z