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Ganapathy, Jagadeesan,Damodharan, Kannan,Manickam, Bakthadoss,Sanmargam, Aravindhan The Basic Science Institute Chosun University 2014 조선자연과학논문집 Vol.7 No.3
The crystal structure of the title compounds with both coumarin and sulfonamide moieties were examined. These two groups have very special for their pharmaceutical and medicinal properties have been determined from single crystal X-ray diffraction data. In the title compound crystallizes in the monoclinic space group $P2_1/c$ with unit cell dimension a=$8.5775(4){{\AA}$, b=$24.9943(13){\AA}$ and c=$13.7319(7){\AA}$ [alpha & gamma=$90^{\circ}$ beta=$103.558(2)^{\circ}$]. In the structure The S1 atom shows a distorted tetrahedral geometry, with O1-S1-O2 [$121.08(1)^{\circ}$] and N1-S1-C5 [$105.85(1)^{\circ}$] angles deviating from ideal tetrahedral values are attributed to the Thrope-Ingold effect. The sum of bond angles around N1 ($354.9^{\circ}$) indicates that N1 is in $sp^2$ hybridization. The Pyridine ring adopts boat conformation and pyran rings adopt a sofa conformation. Crystal structure is stabilized by C-H...O intra molecular hydrogen bond interactions.
Ganapathy, Jagadeesan,Damodharan, Kannan,Manickam, Bakthadoss,Sanmargam, Aravindhan The Basic Science Institute Chosun University 2013 조선자연과학논문집 Vol.6 No.4
The crystal structure of the potential active 4,6-dimethyl-9-phenyl-8,12-dioxa-4,6-diazatetracyclo [8.8.0.02,7.013,18] octadeca-2(7),13,15,17-tetraene-3,5,11-trione 2-ethoxyphenyl (2E)-but-2-enoate ($C_{22}H_{18}N_2O_5$) has been determined from single crystal X-ray diffraction data. In the title compound crystallizes in the monoclinic space group $P_12_1/c_1$ with unit cell dimension a=15.2039(8), b=12.3888(6) and c= 9.8162(5) [alpha & $gamma=90^{\circ}$ beta=98.113(2)]. In the structure fused pyrone and pyran rings each adopt a sofa/envelop conformation. The crystal structure is stabilized by intramolecular C-H... O hydrogen bond interaction.
Crystal Structure Analysis of Methyl-3-phenyl-3H-chromeno[4,3-c]isoxazole-3a(4H)-carboxylate
Ganapathy, Jagadeesan,Srinivasan, J.,Manickam, Bakthadoss The Basic Science Institute Chosun University 2015 조선자연과학논문집 Vol.8 No.3
The crystal structure of the potential active methyl-3-phenyl-3H-chromeno[4,3-c]isoxazole-3a(4H)-carboxylate ($C_{18}H_{15}NO_4$) has been determined from single crystal X-ray diffraction data. In the title compound crystallizes in the orthorombic space group $P2_12_12_1$ with unit cell dimension $a=9.8320(17){\AA}$, $b=9.9890(18){\AA}$ and $c=15.588(3){\AA}$ [${\alpha}=90^{\circ}$, ${\beta}=90^{\circ}$ and ${\gamma}=90^{\circ}$]. In the structure chromene, isoxazole and carboxylate are almost coplanar each other. All geometrical parameters revelled that chromene ring of pyran ring adopt sofa conformation. The crystal packing is stabilized by intermolecular C-H...O and C-H...N hydrogen bond interaction.
Crystal Structure Analysis of Methyl-3-phenyl-3H-chromeno[4,3-c]isoxazole-3a(4H)-carboxylate
Jagadeesan Ganapathy, J. Srinivasan, Bakthadoss Manickam 조선대학교 기초과학연구원 2015 조선자연과학논문집 Vol.8 No.3
The crystal structure of the potential active methyl-3-phenyl-3H-chromeno[4,3-c]isoxazole-3a(4H)- carboxylate (C18H15NO4) has been determined from single crystal X-ray diffraction data. In the title compound crystallizes in the orthorombic space group P212121 with unit cell dimension a=9.8320 (17) Å, b=9.9890 (18) Å and c= 15.588 (3)Å [α=90°, β= 90o and γ= 90o]. In the structure chromene, isoxazole and carboxylate are almost coplanar each other. All geometrical parameters revelled that chromene ring of pyran ring adopt sofa conformation. The crystal packing is stabilized by intermolecular C-H...O and C-H...N hydrogen bond interaction.
Jagadeesan Ganapathy, Kannan Damodharan, Bakthadoss Manickam, Aravindhan Sanmargam 조선대학교 기초과학연구원 2014 조선자연과학논문집 Vol.7 No.3
The crystal structure of the title compounds with both coumarin and sulfonamide moieties were examined. These two groups have very special for their pharmaceutical and medicinal properties have been determined from single crystal Xray diffraction data. In the title compound crystallizes in the monoclinic space group P21/c with unit cell dimension a=8.5775(4)Å, b= 24.9943(13)Å and c=13.7319(7)Å [alpha & gamma=90o beta= 103.558(2)o]. In the structure The S1 atom shows a distorted tetrahedral geometry, with O1—S1—O2 [121.08 (1)o] and N1-S1-C5 [105.85 (1)o] angles deviating from ideal tetrahedral values are attributed to the Thrope-Ingold effect. The sum of bond angles around N1 (354.9o) indicates that N1 is in sp2 hybridization. The Pyridine ring adopts boat conformation and pyran rings adopt a sofa conformation. Crystal structure is stabilized by C-H…O intra molecular hydrogen bond interactions.
Ganapathy, Jagadeesan,Sivakumar, G.,Manickam, Bakthadoss,Sanmargam, Aravindhan The Basic Science Institute Chosun University 2015 조선자연과학논문집 Vol.8 No.1
In view of the growing medicinal importance of chromene and its derivatives, the single crystal X-ray diffraction study was carried out for the potential active 4,6-dimethyl-9-phenyl-8,12-dioxa-4,6-diazatetracyclo [8.8.0.02,7.013,18]octadeca-2(7),13,15,17-tetraene-3,5,11-trione-2-ethoxyphenyl (2E)-but-2-enoate ($C_{18}H_{20}N_2O_5$). In the title compound are two molecules exist in the asymmetric unit. It crystallizes in the monoclinic space group $P2_1/c$ with unit cell dimension a=14.608(3) ${\AA}$, b=12.845(3) and c= 17.781(4) [alpha & gamma=$90^{\circ}$ beta=$91.233(5)^{\circ}$]. Both pyran and pyran ring of the chromene moiety adopts sofa conformation in the molecule A & B. The crystal structure is stabilized by intramolecular C-H...O hydrogen bond interaction.