... Page 8. CANADIAN JOURNAL OF CHEMISTRY. ... The 60 MHz pmr spectrum showed a doublet cen- tered at r 5.70 (lH, J - 6 Hz for the methine hydrogen); a multiplet between 6.CL6.32 (1H); two singlets at 6.66 and 6.68 (6H); and a multiplet between 8.0-9.25 (7H). ...