Results 21 to 30 of about 2,584 (187)

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
openaire   +3 more sources

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

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
openaire   +4 more sources

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
openaire   +5 more sources

1-Methylpiperazine-1,4-diium dipicrate

Acta Crystallographica Section E, 2011
In the crystal structure of the title compound [systematic name: 1-methylpiperazine-1,4-diium bis(2,4,6-trinitrophenolate)], C5H14N22+·2C6H2N3O7−, the ionic components are connected by relatively strong N—H...O hydrogen bonds
Grzegorz Dutkiewicz, S. Samshuddin, B. Narayana, H. S. Yathirajan, Maciej Kubicki   +4 more
doaj   +1 more source

Extended conformation of putrescine occurring on a center of symmetry in its 1:2 complex with malonic acid [PDF]

, 1997
The 1,4-butane diammonium (putrescine) crystalizes with propanedioic acid (malonic monoanions in space group Pcab (1,4-butane diammonium hydrogen propanedioate, C4H14N22+.2C(3)H(3)O(4)(-)).
Babu, A.M., Murthy, M.R.N., Weakley, T.J.R.   +2 more
core   +1 more source

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
openaire   +3 more sources

Studies on heavy metal removal efficiency and antibacterial activity of 2-(diphenylphosphino)aminopyridine

Macedonian Journal of Chemistry and Chemical Engineering, 2018
The solvent extraction of metal picrates such as Ni2+, Cu2+, Co2+, Pb2+ and Cd2+ from the aqueous to the organic phase was studied using 2-(diphenylphosphino)aminopyridine (Ph2PNHpy).
Özlem Sarıöz, Burcu Malgaç, Yavuz Sürme, Sedef İlk, Muhsin Karaarslan   +4 more
doaj   +1 more source

Chiral separation by enantioselective liquid–liquid extraction [PDF]

, 2011
The literature on enantioselective liquid–liquid extraction (ELLE) spans more than half a century of research. Nonetheless, a comprehensive overview has not appeared during the past few decades.
Feringa, Ben L.,, Heeres, Hero J.,, Minnaard, Adriaan J.,, Schuur, Boelo,, Verkuijl, Bastiaan J.V.,, Vries, Johannes G. de,   +5 more
core   +3 more sources

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
openaire   +3 more sources