Structural Studies of Some Phenoxazine Derivatives

The compound 10-3'-chlorobutyl phenoxazine (A), crystallizes in the triclinic space group P (I) over bar with a = 11.664(2)angstrom, b = 12.6292(2)angstrom, c = 10.5832(14)angstrom, alpha = 113.041(9)degrees, beta = 99.543(11)degrees, gamma = 83.340(10)degrees, V = 1412.5(3)angstrom(3) and Z = 2. The structure is refined to R = 0.102. There are two molecules in the asymmetric unit. The packing of the molecules shows stacking along all the three axes. When viewed down, b, the two molecules of the asymmetric unit appear almost perpendicular to each other. The compound, 10-(3'-N-Pyrrolidinopropyl)-2-trifluoro methyl phenoxazine hydrochloride (B), crystallizes in the monoclinic space group C2/c with a = 25.046(13)angstrom, b = 11.638(6)angstrom, c = 14.384(28 angstrom), beta = 107.25(8)degrees, V = 4003(2)angstrom(3) and Z = 8. The structure is refined to R = 0.065. the packing of the molecules shows stacking when viewed down b axis. The compound, 10-(N-morpholinoacetyl)-2-trifluoromethyl phenoxazine.(C), crystallizes in the monoclinic space group P2(1)/n with a = 12.710(4)angstrom, b = 8.5163(14)angstrom, c = 17.157(4)angstrom, beta = 108.62(2)degrees, V = 1759.9(7)angstrom(3) and Z = 4. The structure is refined to R = 0.041. The Packing of the molecules shows layered arrangement when viewed along b. The compound, 10-(N-chloroacetyl)-2-trifluoromethyl phenoxazine (D), crystallizes in the monoclinic space group P2(1)/a with a = 8.888(2)angstrom, b = 10.870(1)angstrom, c = 14.544(2)angstrom, beta = 102.48(2)degrees, V = 1372(4)angstrom(3) and Z = 2. The structure is refined to R = 0.089. Intra and intermolecular hydrogen bonds are observed in the structure. The compound, 10-N-piperidino acetyl phenoxazine (E), crystallizes in the monoclinic space group P2(1)/a with a - 12.314(4)angstrom, b = 9.108(3)angstrom, c = 14.586(4)angstrom, beta = 106.26(2)degrees, V = 1621.4(8)angstrom(3) and Z = 4. The structure is refined to R = 0.08. Packing of molecules shows stacking in two layers when viewed along b. One layer has the three fused rings and other layer has the cyclohexane ring