Electron-transfer cross-reactions between neutral molecules and their radical cations spanning a wide range of structural type and intrinsic reactivity have been analyzed using classical Marcus theory. The principal factor found to govern intrinsic reactivity is the inner-shell bond reorganization energy. The HOMO-LUMO overlap of alkyl groups on reacting molecules is generally sufficient to pro...

An efficient one-pot synthesis of pyrazolo[3,4-d]pyrimidine derivatives by the four-component condensation of hydrazines, methylenemalononitriles, aldehydes and alcohols has been developed via two different reaction pathways. The structures of target products were characterized by IR spectroscopy, NMR ((1)H and (13)C) spectroscopy and HRMS (ESI) spectrometry. The crystal structure of 4-ethoxy-6...

The title compound, C(28)H(20)N(2)O(4), was synthesized by the reaction of 2-(hydrazonometh-yl)phenyl benzoate with iodine. The mol-ecule possesses a crystallographically imposed center of symmetry at the mid-point of the hydrazine N-N bond. The substituents at the ends of the C=N bonds adopt an E,E configuration. Inter-molecular C-H⋯π(arene) hydrogen bonds and aromatic π-π stacking inter-actio...

The mol-ecule of the title compound, C(16)H(16)N(2), is centrosymmetric and the dihedral angle between the benzene ring and the dimethyl-hydrazine mean plane is 16.11 (15)°.

In the title compound, C(16)H(14)Br(2)N(2)O(2), the dihedral angle between the mean planes of the two benzene rings is 33.4 (2)°. The hydrazine group is twisted slightly, with C-N-N-C and C-C-N-N torsion angles of 167.5 (4) and 177.2 (4)/174.2 (4)°, respectively.

The complete mol-ecule of the title compound, C(28)H(24)N(2)O(2), is generated by a centre of inversion (at the mid-point of the N-N bond). The substituents at the ends of the C=N bonds adopt an E,E configuration. The central -CH=N-N=CH- fragment is planar, but as a whole the mol-ecule is not: the benz-yloxy group is rotated about the O-C bond by 69.3 (2)° with respect to the plane of the benzy...

In the title compound, C(15)H(12)F(2)N(2)O, the dihedral angle between the two benzene rings is 48.73 (8)°. The hydrazine group is twisted slightly, with a C-N-N-C torsion angle of 172.48 (12)°. In the crystal, mol-ecules are connected by strong N-H⋯O and weak C-H⋯O hydrogen bonds, forming supra-molecular chains along the c axis. The structure is consolidated by π-π [centroid-centroid separatio...

The title compound, C(10)H(12)N(4)O(2), was prepared as an inter-mediate for the synthesis of metamitron. The benzene ring plane forms dihedral angles of 66.0 (1) and 3.5 (5)° with the hydrazine plane and the acetyl-imino plane, respectively. The crystal structure involves inter-molecular N-H⋯O hydrogen bonds.