oil vacuum dried to yield 5 28 g 70 of i the oil turns into a solid in few days 1 h rmn cdcl 3 300 mhz 3 23 2h d ch 2 4 95 2h dd u2550 ch 2 5 78 1h m u2550 ch 6 95 1h d harom 7 12 7 33 5h m harom 7 68 1h d harom ppm 13 c rmn cdcl 3 75 mhz 34 0 108 5 114 9 and 115 4 cn 116 7 117 6 120 8 120 9 121 0 126 7 128 5 131 6 132 4 135 3 135 4 151 1 161 7 ppm ir nacl 3082 u2550 ch 2 2229 cn 1615 c u2550 c 1595 and 1486 c u2014 c 1246 cm u2212 1 synthesis and purification of 4 h 9 c 4 si ch 3 2 o 9 si ch 3 2 ch 3 c 6 h 4 o substituted phthalonitrile ii a mixture of 1 g 3 84 mmol of 1 and 4 drops of a 0 1 n isopropanol solution of h 2 ptcl 6 6h 2 o aldrich was heated at 60 u00b0 c then 3 g 3 84 mmol of hydrosilyl terminated pdms precursor h 9 c 4 si ch 3 2 o 9 si ch 3 2 h a t holohan et al macromol chem phys 195 2965 1994 were added dropwise the mixture was stirred at 60 u00b0 c for 1 h the oil obtained was purified by.