Evidence for near-neighbour interactions in some substituted methyl derivatives of transition metals including the molecular crystal structure determinations of (π-C<sub>5</sub>H<sub>5</sub>)Fe(CO)<sub>2</sub>CH<sub>2</sub>·CO<sub>2</sub>H and (π-C<sub>5</sub>H<sub>5</sub>)Mo(CO)<sub>3</sub>CH<sub>2</sub>·CO<sub>2</sub>HJ. K. P. Ariyaratne, M. G. Swanwick, M. L. H. Green et al.|Journal of the Chemical Society A Inorganic Physical Theoretical|1969Cited by 59