[C!OSTRIBUTION FROM THE DEPARTMENT OF CHEMISTRY OF THE UNIVERSITY OF KANSAS] THE REPLACEABILITY OF CERTAIN METHYLENE GROUPS AND THE RELATION OF CONSTITUTION TO THE STABILITY OF A C=C LINKAGE H. V. MOYER' AND F. B. DAINS RECEIVED JUNE 4, 1928 PUBLISHED AUGUST 4, 1928 In a previous series of papersJz it has been shown that the methylene hydrogen in many compounds when heated with the ...