Effective molarities (EM/mM) for intramolecular amide-phenol and ester-phenol H-bonds measured at 298 K in TCE^a.

		Ligand
		L9e	L10e	L9f	L10f
Porphyrin	P1a	480	450	770	520
	P2a	48	85	b	b
	P3a	150	120	220	150
	P4a	b	10	b	b

^aAverage error over the data set is ±50%.

^bNo interaction detected.