نتایج جستجو برای: n cocoherent ring

تعداد نتایج: 1072548  

2008
Yu-Feng Li Lin-Tong Wang Fang-Fang Jian

The title compound, C(32)H(36)Br(2)O(2), was prepared by the reaction of 6-bromo-1-(2-bromo-6-hydroxy-naphthalen-5-yl)-naphthalen-2-ol and 1-iodo-hexane. The dihedral angle between the naphthalene ring planes is 63.8 (9)° The crystal structure may be stabilized by two very weak π-π inter-actions involving the six-membered rings, with centroid-centroid distances of 4.012 (4) and 4.010 (4) Å. The...

2012
Yan Jiang Lili Wang Jing Bian Xiaoying Du Xiaoqiang Sun

In the title compound, C(24)H(28)N(2)O(4), the dioxalane ring has an envelope conformation. The cyclo-hexane ring adopts a chair conformation. The dihedral angle between the benzene rings is 72.5 (3)°. The mol-ecular conformation is stabilized by two intra-molecular O-H⋯N hydrogen-bonding inter-actions with an S(6) graph-set motif. The crystal structure is stabilized by van der Waals inter-acti...

2009
Niusha Mahmoodi Marek Nečas Robert Vícha

The structure of the title compound, C(26)H(28)N(2)O(2), contains essentially planar quinoline and benzene rings, the maximum deviations from the best plane being 0.086 (2) and 0.0056 (19) Å, respectively; the dihedral angle between the rings is 82.87 (4)°. The adamantane cage consists of three fused cyclo-hexane rings in classical chair conformations, with C-C-C angles in the range 107.85 (15)...

2010
Raza Murad Ghalib Othman Sulaiman Sayed Hasan Mehdi Jia Hao Goh Hoong-Kun Fun

The asymmetric unit of the title compound, C(20)H(22)N(2)O(4), comprises two crystallographically independent mol-ecules (A and B) with slightly different geometries. The dihedral angle between the two terminal phenyl rings is 61.7 (1)° in mol-ecule A and 29.6 (1)° in B. The cyclo-hexane rings adopt chair conformations. In the crystal packing, inter-molecular N-H⋯O hydrogen bonds inter-connect ...

2010
Muhammad Saleh Salga Hamid Khaledi Hapipah Mohd Ali Rustam Puteh

In the title compound, C(20)H(24)N(4), the cyclo-hexane ring adopts a chair conformation with the two imine groups linked at equatorial positions. The two halves of the mol-ecule are related by a crystallographic twofold rotation axis. The dihedral angle between the pyridine rings is 75.73 (3)°.

2014
Catalin Mititelu Verginica Barbu Mititelu

This paper presents our relations-oriented approach to the shared task on lexical access in language production, as well as the results we obtained. We relied mainly on the semantic and lexical relations between words as they are recorded in the Princeton WordNet, although also considering co-occurrence in the Google n-gram corpus. After the end of the shared task we continued working on the sy...

2011
Sayed Hasan Mehdi Rokiah Hashim Raza Murad Ghalib Chin Sing Yeap Hoong-Kun Fun

In the title compound, C(21)H(22)O(5), the mean planes of the pyran and dimeth-oxy-phenyl rings are nearly perpendicular to one another, with the dihedral angle between them being 88.21 (8)°. The pyran ring adopts a boat conformation whereas the two fused cyclo-hexane rings adopt envelope conformations. In the crystal, mol-ecules are linked into a three-dimensional network by inter-molecular C-...

2010
T. Kavitha S. Ponnuswamy R. Vijayalakshmi M. Thenmozhi M. N. Ponnuswamy

In the title compound, C(13)H(22)N(2)O, the central imidazolidine ring is in an envelope conformation and the two cyclo-hexane rings adopt chair conformations. In the crystal structure, the mol-ecules are linked into centrosymmetric R(2) (2)(8) dimers by pairs of N-H⋯O hydrogen bonds.

2009
Orhan Büyükgüngör Serkan Yavuz Mustafa Odabaşoğlu Özgür Pamir Yılmaz Yıldırır

In the title compound, C(18)H(18)N(2)O, the cyclo-hexene and cyclo-hexane rings of the bicyclo-[2.2.2]oct-5-ene unit adopt distorted boat conformations. In the crystal, mol-ecules exist as C-H⋯N hydrogen-bonded centrosymmetric R(2) (2)(14) dimers, which are further linked by C-H⋯π inter-actions.

2010
Hoong-Kun Fun Charoen Pakathirathien Chatchanok Karalai Suchada Chantrapromma

The title compound, C(20)H(30)O(4), is a dolabrane diterpenoid isolated from Ceriops tagal, in which one of the three fused cyclo-hexane rings adopts a half-chair conformation and the other two are in the standard chair conformations. The hy-droxy-methyl-idene substituent is attached to the half-chair cyclo-hexane. An intra-molecular O-H⋯O hydrogen bond generate an S(6) ring motif. In the cryst...

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