# MP2/6-31G correlation energy of water on a UHF reference.
# The reference and the spin-scaling variant are route options of the model.
mp2(reference=uhf)/6-31g scf(conv=1e-10)
geom="""
O   0.000000000   0.000000000  -0.041061554
H  -0.533194329   0.533194329  -0.614469223
H   0.533194329  -0.533194329  -0.614469223
"""