نتایج جستجو برای: ring inversion

تعداد نتایج: 164449  

2013
G. Suresh A. Nandakumar V. Sabari P. T. Perumal S. Aravindhan

In the title compound, C(26)H(27)ClN(3)O(3)P, the mean plane of the central pyrazole ring forms a dihedral angle of 71.37 (14)° with the chloro-phenyl ring. In the crystal, mol-ecules are linked by pairs of N-H⋯O hydrogen bonds, forming inversion dimers with R(2) (2)(10) ring motifs. The 3-phenyl ring is disordered with four C atoms occupying two sets of sites with an occupancy ratio of 0.748 (...

2010
Sean McGill Vladimir N. Nesterov Stephanie L. Gould

In the title complex, [Zn(C(48)H(36)N(4))]·CH(2)Cl(2), the Zn(II) atom lies on an inversion center and the dichloro-methane solvent mol-ecule is disordered around an inversion center. The tolyl substituents are twisted compared to the central aromatic ring system of the porphyrin, similar to what is seen in previously published structures of this molecule [Dastidar & Goldberg (1996 ▶). Acta Cry...

2015
Jasim Alshawi Muoayed Yousif Karzan H. Zangana Inigo J. Vitorica Yrezabal Richard Winpenny Mohamad J. Al-Jeboori

The whole mol-ecule of the title compound, C24H32N4O4, is generated by inversion symmetry. The cyclo-hexane ring adopts a chair conformation and the conformation about the C=N bonds is E. The pyrrole rings have an anti confirmation with respect to the cyclo-hexane moiety and the ethyl acetate groups have extended conformations. In the crystal, mol-ecules are linked by pairs of C-H⋯O hydrogen bo...

2014
Laurette Schmitt Helen Stoeckli-Evans

The heterocyclic molecule in the title solvate, C16H14N4·2CHCl3, possesses inversion symmetry, with the inversion centre situated at the centre of the pyrazine ring. The outer pyridine rings are inclined to the central pyrazine ring by 4.89 (9)°. The compound crystallized as a chloro-form disolvate with the solvent mol-ecules linked to the title mol-ecule by C-H⋯N hydrogen bonds. In the crystal...

2014
Jie Zhao Jianchao Yuan Weibing Xu Jingjing Chen Yanqiong Mu

In the title compound, C36H36N2, a product of the condensation reaction of 2,3-dimethyl-6-phenyl-vinyl-benzenamine and 2,3-butane-dione, the complete mol-ecule is generated by the application of an inversion centre. The central C-C bond in the 1,4-di-aza-butadiene fragment is trans-configured and situated about the inversion center. The dihedral angle between the ring attached to N and the 1,4-...

2016
Kuppan Chandralekha Adukamparai Rajukrishnan Sureshbabu Deivasigamani Gavaskar Srinivasakannan Lakshmi

In the title compound, C35H30N4O3, the spiro C atom connects the five-membered pyrrolidine ring and the indeno-quinoxaline ring system. The pyrrolidine ring adopts a twist conformation. An intra-molecular N-H⋯N inter-action between the amino group and the pyrazine ring is observed. In the crystal, mol-ecules are linked by a pairs of C-H⋯O hydrogen bonds, forming inversion dimers.

2013
Seenivasan Karthiga Devi Thothadri Srinivasan Jonnalagadda Naga Siva Rao Raghavachary Raghunathan Devadasan Velmurugan

In the title compound, C28H25N3O4, the central pyrrolidine ring adopts adopts an envelope conformation with the N atom as the flap and the piperidine ring adopts a chair conformation. The pendant pyrrolidine ring is almost planar (r.m.s. deviation = 0.008 Å). An intra-molecular C-H⋯O inter-action closes an S(6) ring. In the crystal, inversion dimers linked by pairs of N-H⋯O hydrogen bonds gener...

2015
Ajaykumar D. Kulkarni Md. Lutfor Rahman Mashitah Mohd. Yusoff Huey Chong Kwong Ching Kheng Quah

The title compound, C23H22FN5S, exists in a trans conformation with respect to the methene C=C and the acyclic N=C bonds. The 1,2,4-triazole-5(4H)-thione ring makes dihedral angles of 88.66 (9) and 84.51 (10)°, respectively, with the indole and benzene rings. In the crystal, mol-ecules are linked by pairs of N-H⋯S hydrogen bonds, forming inversion dimers with an R 2 (2)(8) ring motif. The dimer...

2014
Hong Dae Choi Pil Ja Seo Uk Lee

In the title compound, C18H17BrO2S, the dihedral angle between the mean plane of the benzo-furan ring system and the benzene ring is 68.58 (4)°. In the crystal, mol-ecules are linked via pairs of C-H⋯O hydrogen bonds into inversion dimers. These dimers are linked by C-H⋯O hydrogen bonds and π-π inter-actions between the benzene rings of neighbouring mol-ecules [centroid-centroid distance = 3.78...

Journal: :Nigerian journal of clinical practice 2009
J O Eigbefoh S A Okogbenin F Omorogbe P S Mabayoje

A rare case of non-puerperal chronic uterine inversion secondary to sub mucous fibroid in a 38-year-old woman is presented. There was complete uterine inversion with the incarcerated inverted uterus protruding through the vvgina beyond the vulva. The sub mucous fibroid was attached to the fundus. At laparotomy, a dimple with a constriction ring was found in the position of the uterus. The dista...

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