Table 2. Geometrical Parameters (in Å) of the Intra- and Intermolecular Hydrogen Bonds^a.

	intramolecular (o-substituent)			intermolecular (COOH or CONH2 group)
compd	O/S–H	H···O	O/S···O	O/N–H	H···O	O/N···O
Monomers
benzamide				1.007
benzoic acid				0.964
salicylamide	0.982	1.698	2.575	1.007
2-mercaptobenzamide	1.346	2.000	3.107	1.007
salicylic acid	0.975	1.772	2.628	0.964
thiosalicylic acid	1.346	1.908	3.034	0.964
salicylamide	0.958		2.995	1.007
2-mercaptobenzamide	1.346		2.833	1.007
salicylic acid	0.959		2.698	0.963
thiosalicylic acid	1.347		2.739	0.964
Dimers
benzamide				1.025	1.841	2.864
benzoic acid				0.994	1.659	2.653
salicylamide	0.981	1.691	2.569	1.024	1.846	2.869
2-mercaptobenzamide	1.345	2.020	3.123	1.025	1.848	2.871
salicylic acid	0.974	1.766	2.620	0.993	1.667	2.660
thiosalicylic acid	1.343	1.914	3.030	0.991	1.674	2.665
salicylamide	0.958		2.985	1.026	1.843	2.865
2-mercaptobenzamide	1.346		2.834	1.025	1.841	2.862
salicylic acid	0.959		2.677	0.994	1.661	2.665
thiosalicylic acid	1.347		2.715	0.993	1.664	2.657

^aO–H or S–H or N–H bond lengths as well as the H···O and O···O or S···O or N···O distances are included. Results for systems with closed ring by intramolecular hydrogen bond are bolded. Results for systems without intramolecular hydrogen bond are presented in the normal mode.