No abstract

An attempt has been made to study the influence of lone pair electrons on the potential constants of BrF, with a modified Urey-Bradley force field. It is found that the lone pair -bond pair repulsion is greater than the bond pair -bond pair repulsion. It is also concluded from a study of other molecules containing halogen atoms that the ratio of lone pair -bond pair interaction to bond pair -bond pair interaction is very nearly 1.23.

No abstract

A modified U.B.F.F. containing terms directly related to lone pair electrons, has been used to evaluate the potential constants of SeOF2. The value obtained for the Se-O stretching constant supports the double bond character of the bond. The lone pair-bond pair repulsion bears a fixed ratio to the non-bonded repulsion (FeF/FFF=1.24 and Feo/FoF=1.23) and this result is in agreement with earlier conclusions.