Structure Data of Free Polyatomic Molecules
129
MW
CH4F2O
Difluoromethane – water (1/1)
(weakly bound complex)
r0
F...H(1) a)
Atom
O
H(1) a)
H(2) b)
Å
2.20(1)
|as| [Å]
2.480
2.128
3.290
|bs| [Å]
0.341
0.09
0.32
θ0
a
F...H(1)–O )
C–F...H(1) a)
deg
135(3)
93(1)
Cs
(effective symmetry class)
(large-amplitude motion)
CH2F2 · H2O
|cs| [Å]
0.09
0.24
0.02
The water molecule lies in the FCF plane of difluoromethane, linked through an O–H...F
hydrogen bond to one fluorine atom, and opposite to the second one.
a
) The hydrogen of the water, which is involved in the hydrogen bond.
) The hydrogen of the water, which is free from the hydrogen bond.
b
Caminati, W., Melandri, S., Rossi, I., Favero, P.G.: J. Am. Chem. Soc. 121 (1999) 10098.
Landolt-Börnstein
New Series II/28B