The premise that hydrogen bonding wouldn't exist if the bond angle was opened is incorrect.
Molecular geometry is determined by the type of bonds between the atoms that make up the molecule. Repeat the same experiment for carbon dioxide, CO2. Argonne National Laboratory, Division of Educational Programs, Harold Myron, Ph. The Element Coordinates section is used to change the coordinates of the atoms. This lab intentionally! deals with only planar molecules. The explanation implies that the permanent dipole moment of water should decrease rapidly with increasing temperature, and that water molecules in steam would have a dipole moment of zero. The stability of a molecule is based on the energy of the molecule. This result has been demonstrated both experimentally and through quantum computations. This type of spectroscopy is microwave spectroscopy.