Syntheses and structures of dihydrocalix[4]arenes bearing O-benzonitrile and O-acetonyl substituents

Three 25,27-dihydrocalix[4]arene derivatives, bearing benzonitrile and acetone groups on the oxygens, were prepared and structurally characterized. All three structures crystallize in , with cell dimensions: bis(benzonitrile)calix[4]arene·toluene, a = 11.530(2) Å, b = 12.013(2) Å, c = 14.089(4) Å, = 103.555(18)°, = 94.341(18)°, = 104.704(16)°, and V = 1815.9(7) ų; anti-bis-acetone-calix[4]arene, a = 7.5847(8) Å, b = 12.0948(17) Å, c = 15.3375(16) Å, = 78.982(10)°, = 76.932(9)°, = 73.129(10)°, and V = 1299.6(3) ų; syn-bis-acetone-calix[4]arene, a = 9.080(3) Å, b = 10.391(3) Å, c = 14.816(3) Å, = 96.998(19)°, = 100.02(2)°, = 103.93(3)°, and V = 1299.6(3) ų.