Hydrogen electron density distribution analysi

Qualitatively speaking, itha denotes the number of electrons that is shared by the hydrogen atom H and the acceptor atom A. It is calculated in a population analysis [244—246], where electrons are distributed to different atoms according to the contribution of (modified) atomic orbitals (i.e. of a minimum set of basis functions) to the molecular orbitals. The shared-electron number is thus a single-valued descriptor for the electronic density between the atoms H and A. 

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