Results 1 to 10 of about 6,324 (153)
Diethyl pyrazine-2,5-dicarboxylate [PDF]
Acta Crystallographica Section E Structure Reports Online, 2012 The mol-ecule of the title compound, C(10)H(12)N(2)O(4), is located around an inversion center. The carboxyl-ate groups are twisted slightly with respect to the pyrazine ring, making a dihedral angle of 2.76 (19)°. In the crystal, mol-ecules are stacked along the c axis via weak C-H⋯O hydrogen bonds.
Chuan-Hui Li, Wen-Shi Wu, Yu-Min Huang
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Methyl pyrazine-2-carboxylate [PDF]
Acta Crystallographica Section E Structure Reports Online, 2009 The title compound, C(6)H(6)N(2)O(2), is approximately planar [r.m.s. deviation = 0.0488 (3) Å]. In the crystal, weak inter-molecular C-H⋯O and C-H⋯N inter-actions join the mol-ecules into an infinite three-dimensional network.
Chang-Hua Zhang +2 more
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Diisopropyl pyrazine-2,5-dicarboxylate [PDF]
Acta Crystallographica Section E Structure Reports Online, 2010 The mol-ecule of the title compound, C(12)H(16)N(2)O(4), is located on an inversion center. The carboxyl-ate groups are twisted slightly with respect to the pyrazine ring, making a dihedral angle of 6.4 (3)°.
Xiao-Qing Zhang +3 more
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IUCrData, 2021 The title compound, C4H4N2S, was obtained by the reduction of 2-mercaptopyrazine (during its crystallization with 2-mercaptopyrazine and isonicotinic acid N-oxide in ethanol solution. It crystallizes in the monoclinic space group P21/m. In the crystal, the molecules are linked by N—H...N and C—H...S hydrogen bonds.
Adrian Olszewski, Kinga Wzgarda-Raj
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Tight-Binding Approach to Pyrazine-Mediated Superexchange in Copper–Pyrazine Antiferromagnets [PDF]
Inorganic Chemistry, 2021 We investigate the cause of spatial superexchange anisotropy in a family of copper-based, quasi-two-dimensional materials with very similar geometries. The compounds in this family differ mainly in their inter-layer separation but they have very different magnetic interactions, even within the basal plane.
E. P. Kenny, A. C. Jacko, B. J. Powell
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Nifedipine–pyrazine (2/1) [PDF]
Acta Crystallographica Section E Structure Reports Online, 2010 In the title compound, 2C(17)H(18)N(2)O(6)·C(4)H(4)N(2) [systematic name: 3,5-dimethyl 2,6-dimethyl-4-(2-nitro-phen-yl)-1,4-di-hydro-pyridine-3,5-dicarboxyl-ate-pyrazine (2/1)], the complete pyrazine molecule is generated by crystallographic inversion symmetry. The center of the pyrazine ring lies on an inversion center.
Schultheiss, Nate +2 more
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2-(2-Methoxyphenoxy)pyrazine [PDF]
Acta Crystallographica Section E Structure Reports Online, 2011 A significant twist is observed in the title molecule, C(11)H(10)N(2)O(2), as seen in the dihedral angle between the pyrazine and benzene rings of 72.79 (8)°. The meth-oxy group is almost coplanar with the benzene ring to which it is attached [C-O-C-C torsion angle = 175.83 (15)°].
Shah Bakhtiar Nasir +4 more
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2-(4-Methoxyphenoxy)pyrazine [PDF]
Acta Crystallographica Section E Structure Reports Online, 2010 In the title compound, C(11)H(10)N(2)O(2), the aromatic rings are almost orthogonal to each other [dihedral angle = 86.97 (8)°], with the benzene ring orientated to face one of the pyrazine N atoms. In the crystal, centrosymmetrically related pairs are connected via pairs of C—H⋯π interactions and the dimeric units thus formed pack into undulating ...
Shah Bakhtiar Nasir +5 more
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, 2022 Curiosity and sustainable development go hand in hand to help with the major problems of our time. This thesis shows how curiosity driven research can result in new insights. The thesis describes the development new building blocks from biomass, which have never been used in materials before, and their subsequent use in plastics.
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1-[2-(Pyrazin-2-ylsulfanyl)ethyl]pyrazine-2(1H)-thione [PDF]
Acta Crystallographica Section E Structure Reports Online, 2011 The title multifunctional twisted organic ligand, C(10)H(10)N(4)S(2), contains a short C=S bond [1.671 (2) Å]. The dihedral angle between the two pyrazine rings is 39.83 (6)°. In the crystal, inter-molecular C-H⋯N and C-H⋯S hydrogen bonds result in the formation of a supra-molecular network.
Xi-Zai Zhao +4 more
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