نتایج جستجو برای: ring inversion

تعداد نتایج: 164449  

2014
Zheng Shen Qiu-Xia Mao Ji-Long Ge Yong-Rui Tu Yan Wang

In the title mol-ecule, C11H10ClFO2, the benzene ring, the F atom and the O atom of the di-hydro-pyran ring are essentially coplanar, with an r.m.s. deviation of 0.007 Å. The di-hydro-pyran ring is in a half-chair conformation. In the crystal, mol-ecules are linked by pairs of weak C-H⋯π hydrogen bonds, forming inversion dimers.

2014
R. Vishnupriya J. Suresh S. Maharani R. Ranjith Kumar P. L. Nilantha Lakshman

In the title compound, C20H22N2O2, the central pyridine ring forms a dihedral angle of 76.32 (8)° with the pseudo-axial benzene ring. The cyclo-octane ring adopts a twisted boat chair conformation. In the crystal, weak inter-molecular C-H⋯π inter-actions between inversion-related mol-ecules result in the formation of linear double chains along the b-axis direction.

2010
Min-Jie Guo Xin Chen Jing-Xia Yao

In the title compound, C(25)H(22)BrN(3)O(5)S, the central benzene ring makes dihedral angles of 32.02 (14), 37.49 (18) and 80.52 (13)°, respectively, with the pyrazolone ring, the bromo-benzene ring and the terminal phenyl ring. This conformation features a short intramolecular C-H⋯O contact that generates an S(6) ring. In the crystal, inversion dimers linked by pairs of C-H⋯O=C hydrogen bonds ...

2013
O. Kotresh H. C. Devarajegowda Arunkumar Shirahatti K. Mahesh Kumar N. M. Mahabhaleshwaraiah

In the title compound, C15H14ClNO2S2, the 2H-chromene ring system is essentially planar, with a maximum deviation of 0.0133 (10) Å. Three C atoms and their attached H atoms of the pyrrolidine ring are disordered [occupany ratio 0.874 (7):0.126 (7)] with both disorder components adopting a twisted conformation. The dihedral angle between the 2H-chromene ring system and the major occupancy compon...

2010
Abdul Qayyum Ather M. Nawaz Tahir Misbahul Ain Khan Muhammad Makshoof Athar Eliana Aparecida Silicz Bueno

In the title compound, C(10)H(10)ClN(5)O(2), the dihedral angle between the aromatic rings is 0.16 (9)°. Two S(6) ring motifs are formed due to intra-molecular N-H⋯N and N-H⋯O hydrogen bonds. In the crystal, inversion dimers linked by pairs of N-H⋯N hydrogen bonds generate R(2) (2)(14) [or R(4) (4)(10) via the intra-molecular hydrogen bonds] ring motifs. Polymeric chains propagating in [210] ar...

2010
Islam Ullah Khan Tahir Ali Sheikh Muhammad Nadeem Arshad

In the title compound, C(14)H(15)NO(3)S, the geometry around the S atom of the SO(2) group is distorted tetra-hedral. The meth-oxy- and methyl-substituted aromatic rings are oriented at a dihedral angle of 71.39 (9)°. Inter-molecular N-H⋯O hydrogen bonds form inversion dimers, which stabilize the crystal structure.

2009
Waqar Nasir Munawar Ali Munawar Saeed Ahmad Sohail Nadeem Muhammad Shahid

In the title compound, C(18)H(19)N(3)O(2), the dihedral angle between the benzene rings is 20.47 (10)° and an intra-molecular N-H⋯O hydrogen bond occurs, generating an S(5) ring. In the crystal, inversion dimers linked by pairs of N-H⋯O hydrogen bonds lead to R(2) (2)(8) loops.

2009
B. Thimme Gowda Sabine Foro P. G. Nirmala Hartmut Fuess

In the crystal structure of the title compound, C(15)H(17)NO(2)S, the conformation of the N-C bond in the C-SO(2)-NH-C segment has gauche torsions with respect to the S=O bonds. The mol-ecule is bent at the S atom with a C-SO(2)-NH-C torsion angle of -61.0 (2)°. The dihedral angle between the two aromatic rings is 49.4 (1)°. The crystal structure features inversion-related dimers linked by pair...

2011
Vinola Z. Rodrigues Sabine Foro B. Thimme Gowda

In the title compound, C(15)H(16)ClNO(2)S, the C-SO(2)-NH-C torsion angle is 67.45 (17)°. The two aromatic rings are tilted relative to each other by 44.5 (1)°. The crystal structure features inversion-related dimers linked by pairs of N-H⋯O hydrogen bonds..

2012
Hoong-Kun Fun Tze Shyang Chia Priya V. Frank Mahesha Poojary Balakrishna Kalluraya

In the title compound, C(14)H(15)N(5)O(4), the central -C=N-N-C(=O)-C- bridge is nearly planar [maximum deviation = 0.037 (1) Å] and forms dihedral angles of 7.37 (9) and 73.33 (5)°, respectively, with the benzene and imidazole rings. The dihedral angle between the benzene and imidazole rings is 66.08 (9)°. The meth-oxy and nitro groups are nearly coplanar with the benzene and imidazole rings, ...

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