Results 21 to 30 of about 2,557 (167)

Cinnarizinium picrate [PDF]

Acta Crystallographica Section E Structure Reports Online, 2012
In the title salt {systematic name: 4-diphenylmethyl-1-[(E)-3-phenylprop-2-en-1-yl]piperazin-1-ium 2,4,6-trinitrophenolate), C26H29N2 +·C6H2N3O7 −, the cinnarizinium cation is protonated at the piperazine N atom connected to the styrenylmethyl group; the piperazine ring adopts a distorted chair conformaiton.
Yanxi Song, C. S. Chidan Kumar, G. B. Nethravathi, S. Naveen, Hongqi Li   +4 more
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3-Bromoanilinium picrate [PDF]

Acta Crystallographica Section E Structure Reports Online, 2009
In the title compound, C(6)H(7)BrN(+)·C(6)H(2)N(3)O(7) (-), the O atoms of two of the nitro groups are disordered over two sites, the ratios of the refined occupancies being 0.72 (6):0.28 (6) and 0.74 (5):0.26 (5). In the crystal structure, the anions and cations are linked via inter-molecular N-H⋯O hydrogen bonds into chains along [100].
Bo Zhao, Yan-jun Li
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1-Piperonylpiperazinium picrate [PDF]

Acta Crystallographica Section E Structure Reports Online, 2014
In the cation of the title salt [systematic name: 4-(2H-1,3-benzodioxol-5-ylmethyl)piperazin-1-ium 2,4,6-trinitrophenolate], C12H17N2O2+·C6H2N3O7−, the piperazine ring adopts a slightly disordered chair conformation. The piperonyl ring system and the piperazine ring are twisted with respect to each other with an N—C—C—C torsion angle of 40.7 (2)°.
Kavitha, C. N., Kaur, M., Anderson, B. J., Jasinski, J. P., Yathirajan, H. S.   +4 more
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1-Methylhydrazinium picrate [PDF]

Acta Crystallographica Section E Structure Reports Online, 2011
In the title salt, CH(7)N(2) (+)·C(6)H(2)N(3)O(7) (-), the dihedral angles between the three nitro groups and the plane of the benzene ring are 22.4 (2), 35.3 (2) and 2.8 (2)°. In the crystal, the components are linked by N-H⋯O and N-H⋯N hydrogen bonds into a two-dimensional network parallel to (10[Formula: see text]).
Xiao-Gang Mu, Xuan-Jun Wang, Youzhi Zhang, Xiaoli Gou, Xia Li   +4 more
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2-Aminoanilinium picrate [PDF]

Acta Crystallographica Section E Structure Reports Online, 2010
In the title compound, C(6)H(9)N(2) (+)·C(6)H(2)N(3)O(7) (-), the three nitro groups of the anion are twisted from the central benzene ring at dihedral angles of 5.4 (1), 27.1 (1) and 32.9 (1)°. In the crystal, inter-molecular N-H⋯O, N-H⋯(O,O) and N-H⋯N hydrogen bonds link the cations and anions into layers parallel to the bc plane.
Yanping Zhao, Rong Peng
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4-Acetylpiperazinium picrate [PDF]

Acta Crystallographica Section E Structure Reports Online, 2014
In the title salt, C6H13N2O+·C6H2N3O7−(systematic name: 4-acetylpiperazin-1-ium 2,4,6-trinitrophenolate), the piperazin-1-ium ring has a slightly distorted chair conformation. In the picrate anion, the mean planes of the twoo-NO2andp-NO2groups are twisted with respect to the benzene ring by 15.0 (2), 68.9 (4) and 4.4 (3)°, respectively. In the crystal,
Kavitha, C. N., Kaur, M., Jasinski, J. P., Yathirajan, H. S.   +3 more
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2-Aminopyrimidinium picrate [PDF]

Acta Crystallographica Section E Structure Reports Online, 2007
The geometric parameters of the title compound, C(4)H(6)N(3) (+)·C(6)H(2)N(3)O(7) (-), are in the usual ranges. While two nitro groups are almost coplanar with the aromatic picrate ring [dihedral angles 3.0 (2) and 4.4 (3)°], the third is significantly twisted out of this plane [dihedral angle 46.47 (8)°].
Narayana, Badiadka, Sarojini, Balladka Kunhanna, Prakash Kamath, K., Yathirajan, Hemmige S., Bolte, Michael   +4 more
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4-Aminopyridinium picrate [PDF]

Acta Crystallographica Section E Structure Reports Online, 2010
In the title compound, C(5)H(7)N(2) (+)·C(6)H(2)N(3)O(7) (-), the 4-amino-pyridinium cation is essentially planar (r.m.s. deviation = 0.002 Å). The three nitro groups in the picrate anion are twisted away from the attached benzene ring [dihedral angles = 24.1 (1), 9.3 (3) and 21.4 (1)°].
P. Ramesh, R. Akalya, A. Chandramohan, M. N. Ponnuswamy   +3 more
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2-Aminopyridinium picrate [PDF]

Acta Crystallographica Section E Structure Reports Online, 2010
In the title compound, C(5)H(7)N(2) (+)·C(6)H(2)N(3)O(7) (-), there are two crystallographically independent cations and anions (A and B) in the asymmetric unit. In both picrate anions, one of the nitro groups lies in the plane of the benzene ring [r.m.s.
M. S. Sivaramkumar, R. Velmurugan, M. Sekar, P. Ramesh, M. N. Ponnuswamy   +4 more
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Synthesis and evaluation of a novel ionophore based on a thiacalix[4]arene derivative bearing imidazole units [PDF]

, 2014
O-Alkylation of the flexible thiacalix[4]arene 1 with 2-chloromethyl-1-methyl-1H-imidazole 2 in the presence of Na₂CO₃ or K₂CO₃ afforded mono-O-alkylation product 3 in 29–51% yield, along with recovery of the starting compound.
Elsegood, Mark R. J., Georghiou, Paris E., Ni, Xin-Long, Rahman, Shofiur, Redshaw, Carl, Tomiyasu, Hirotsugu, Yamato, Takehiko, Zeng, Xi, Zhao, Jiang Lin   +8 more
core   +4 more sources