Crystal structural studies of ethyl-5-(4-chlorophenylsulfonyl)-4-hydroxy-2, 6-dip-tolyl-1, 2, 5, 6-tetrahydropyridine-3-carboxylate and diethyl 4-hydroxy-2-(4-nitrophenyl)-5-(phenylsulfonyl)-6-(phenylsulfonylmethyl)cyclohexa-3,6-diene-1,3-dicarboxylate

J. Suresh; P.S. Harikrishnan; R. Vishnu Priya; S. Perumal

Crystal structural studies of ethyl-5-(4-chlorophenylsulfonyl)-4-hydroxy-2, 6-dip-tolyl-1, 2, 5, 6-tetrahydropyridine-3-carboxylate and diethyl 4-hydroxy-2-(4-nitrophenyl)-5-(phenylsulfonyl)-6-(phenylsulfonylmethyl)cyclohexa-3,6-diene-1,3-dicarboxylate

J. Suresh, P.S. Harikrishnan, R. Vishnu Priya, S. Perumal

Abstract

The crystal structures of trans,trans-Ethyl-5-(4-chlorophenylsulfonyl)-4-hydroxy-2,6-dip-tolyl-1,2,5,6-tetrahydropyridine-3-carboxylate (Ia) and cis-Diethyl 4-hydroxy-2-(4-nitrophenyl)-5-(phenylsulfonyl)-6-(phenylsulfonylmethyl)cyclohexa-3,6-diene-1,3-dicarboxylate (Ib) were elucidated by single crystal X ray diffraction. Compound (Ia) C₂₈H₂₈Cl NO₅S, crystallizes in the monoclinic system, space group P 2₁/c, with a = 9.4530(7) Å, b = 25.366(2) Å, c = 11.4353(8) Å, β = 103.092(7)°, V = 2670 (3) Å³ and Z = 4. The compound (Ib), C₃₁H₂₉N₁O₁₁S₂, crystallizes in the monoclinic system, space group P 2₁/c, with a = 21.179(4) Å, b = 8.4998(16) Å, c = 17.347(3) Å, β = 102.563(3)°, V = 3048.0(10) Å³ and Z = 4. The central piperidine ring of compound (Ia) adopts the sofa conformation and the central cyclohexadiene ring of compound (Ib) adopts the boat conformation. Details of the compounds preparation, crystal structures and hydrogen bonding interactions of the compounds are discussed.

Keywords

Crystal structure; conformation; coordination interactions; hydrogen bond

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