Crystal and molecular structure of diphenylformazane

Omelchenko, Y. A.; Kondrashev, Yu. D.; Ginzburg, S. L.; Neigauz, M. G.

doi:10.1007/bf00747023

Cited by 5 publications

(7 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(1) 9500 (6) o(2) 5663 (12) 0 0 ) 5740 (12) o(4) 5696 (10) N(4FC (6) Table 5 gives the equations of the ring planes and the displacements of the various atoms from them. There are notable similarities between the values obtained here and those for the various determinations of the structure of imidazole (7)(8)(9), though the symmetry about a plane bisecting the C-C bond is not so pronounced here. This is particularly noticeable if one compares N(3pC (5) Table 5).…”

Section: Resultssupporting

confidence: 78%

The crystal structure of the complex salt imidazole imidazolium perchlorate

Quick¹,

Williams²

1976

Can. J. Chem.

View full text Add to dashboard Cite

The crystal structure of imidazole imidazolium perchlorate has been determined at room temperature from three-dimensional diffractometer data, and refined by full-matrix least-squares to a final R = 0.051. The planar imidazole rings are linked by a [Formula: see text] hydrogen bond of length 2.73 Å and rotated with respect to each other about this bond by an angle of 50°. The analysis has failed to give conclusive evidence as to the position of the hydrogen atom between the two imidazoles.

show abstract

Section: Resultssupporting

confidence: 78%

The crystal structure of the complex salt imidazole imidazolium perchlorate

Quick¹,

Williams²

1976

Can. J. Chem.

View full text Add to dashboard Cite

show abstract

“…2, and all have intermolecular NÐHÁ Á ÁN hydrogen bonds (Table 2). These hydrogen bonds are somewhat longer than the analogous interaction in the spiral of the modi®cation of 3-(4-bromophenyl)-1-phenyltriazine, (IV) (3.206 A Ê ; Omel'chenko & Kondrashev, 1973). This difference is due to the different packing characters, where in the case of the¯at parallel molecules the smallest NÐHÁ Á ÁN distance should be 3.60 A Ê .…”

Section: Commentmentioning

confidence: 94%

“…This difference is due to the different packing characters, where in the case of the¯at parallel molecules the smallest NÐHÁ Á ÁN distance should be 3.60 A Ê . The shortening is achieved as a result of strong bending of the molecules of (IV), which form dimers in which the molecules are bent towards one another, and of the deviation of the N atoms from the plane of the molecule to the same side; this con®guration provides additional evidence for the existence of strong interaction between the molecules in the dimer (Omel'chenko & Kondrashev, 1973).…”

Section: Commentmentioning

confidence: 99%

1,3-Bis(4-methylphenyl)triazene, 1-(4-chlorophenyl)-3-(4-fluorophenyl)triazene and 1-(4-fluorophenyl)-3-(4-methylphenyl)triazene

et al. 2005

View full text Add to dashboard Cite

The title 4,4'-disubstituted diphenyl-1,3-triazines, C14H15N3, (I), C12H9ClFN3, (II), and C13H12FN3, (III), each contain a triazene group (-N=N-NH-) having an extended conformation. The dihedral angles between the two benzene rings in (I), (II) and (III) are 4.3, 3.4 and 6.5 degrees , respectively. The molecules are almost entirely planar, with maximum deviations from the mean planes of 0.1087 (2), -0.1072 (7) and 0.1401 (3) A, respectively. In each compound, the molecules are linked by N-H...N hydrogen bonds to form chains and pack similarly in the crystal structures.

show abstract

“…Chelated formazans are red and open chain formazans are yellow in solution. In the crystalline state, 1,5-diphenylformazan (PhHNNCHNNPh) has an open chain structure . For unsymmetric 1,5-diphenyl-1,2,5-triazapentadiene (PhHNNCHCHNPh) in CHCl 3 , an aprotic weakly polar solvent, the chelated form was found to be in equilibrium with the open chain structure, whereas in DMSO, a more polar aprotic solvent, only one open chain structure was present …”

Section: 1 Conjugated Pentad Systemsmentioning

confidence: 99%