Table 1. Water Molecule Multipole Moments Centered on Oxygen: From Experiment, Common Rigid Models, Liquid Phase Quantum Calculations, and OPC Model (This Work).

model	μ [D]	Q0 [DÅ]	QT [DÅ]	Ω0 [DÅ2]	ΩT [DÅ2]
EXP (liquid)45	2.5–3	NA	NA	NA	NA
SPC/E	2.35	0.00	2.04	–1.57	1.96
TIP3P	2.35	0.23	1.72	–1.21	1.68
TIP4P/Ew	2.32	0.21	2.16	–1.53	2.11
TIP5P	2.29	0.13	1.56	–1.01	0.59
AIMD147	2.95	0.18	3.27	NA	NA
AIMD246	2.43	0.10	2.72	NA	NA
QM/4MM36	2.49	0.13	2.93	–1.73	2.09
QM/4TIP5P36	2.69	0.26	2.95	–1.70	2.08
QM/230TIP5P43	2.55	0.20	2.81	–1.52	2.05
OPC	2.48	0.20	2.3	-1.484	2.068