Four substituted pyrazolines.
In the title compounds 5-(3-fluoro-4-phenoxyphenyl)-1,3-biphenyl-4,5-dihydro-1H-pyrazole, C27H21FN2O, (I), 3-(4-chlorophenyl)-5-(3-fluoro-4-phenoxyphenyl)-1-phenyl-4,5-dihydro-1H-pyrazole, C27H20ClFN2O, (II), 5-(3-fluoro-4-phenoxyphenyl)-3-(4-methylphenyl)-1-phenyl-4,5-dihydro-1H-pyrazole, C28H23FN2O, (III), and 5-(3-fluoro-4-phenoxyphenyl)-3-(4-methoxyphenyl)-1-phenyl-4,5-dihydro-1H-pyrazole, C28H23FN2O2, (IV), the five-membered pyrazole ring exists in an envelope conformation. The crystal structure of (I) has three independent C-H...pi intermolecular interactions. In (II), an intermolecular C-Cl...pi contact is present, forming molecular chains. Replacement of this chloro group in (II) by a methyl group yields an isomorphic crystal structure, (III).
Chopra
Deepak
D
Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, Karnataka, India. deepak@sscu.iisc.ernet.in
Mohan
T P
TP
Vishalakshi
B
B
Row
T N Guru
TN
D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D015394:Molecular Structure; D011720:Pyrazoles / Q000737:chemistry*
D011720:Pyrazoles