@article {1311193, title = {The Mechanism of Formation of 1,2,3,4-Tetramethylnapthalene from 2-Butyne and Triphenyltris(tetrahydrofuran)chromium(III)}, journal = {J. Am. Chem. Soc.}, volume = {92}, year = {1970}, note = {33}, pages = {5625-5640}, author = {Whitesides, G. M. and Ehmann, W.J.} }