the potential function of lippincott and schroeder for linear hydrogen bond has been re-examined and extended to nonlinear hydrogen bond. the parameters originally introduced to the potential function by lippincott and schroeder have been determined from the structural parameters such as 0.. .odistance 0-h bond distance, h.. .o distance and hoo angle. thevalidity of harmonic oscillator approxim...

The potential function of Lippincott and Schroeder for linear hydrogen bond has been re-examined and extended to nonlinear hydrogen bond. The parameters originally introduced to the potential function by Lippincott and Schroeder have been determined from the structural parameters such as 0.. .Odistance 0-H bond distance, H.. .O distance and HOO angle. Thevalidity of harmonic oscillator appr...

The molecule in the structure of the title compound, C34H60Si4, lies on a twofold rotation axis that passes through the two Si atoms, resulting in a planar cyclo-tetra-silane ring. The dihedral angle between the cyclo-tetra-silane ring and the phenyl ring is 68.20 (5)°. The Si-Si bonds [2.4404 (8) and 2.4576 (8) Å] are longer than a standard Si-Si bond (2.34 Å) and the C-Si-C bond angle [97.07 ...

The mol-ecular structure of the title compound, C18H21N3S, shows a twisted conformation with a dihedral angle of 67.45 (4)° between the aromatic ring planes and an N-C-C-S torsion angle of -5.01 (13)°. The imidazolidine ring and the aniline moiety make a dihedral angle of 56.03 (4)° and the asscociated C-N-C angle is 125.71 (10)°. The guanidine-like C=N double bond is clearly localized, with a ...

In most studies, braking of vehicle in a straight path has been considered. When vehicle moves in a curved path, the effect of camber angle and fork angle should be considered. The variable camber angle assists braking in a curved road but the turning radius of vehicle changes due to varying camber angle and fork angle. The antilock braking system (ABS) is used for enhancing vehicle directional...

In the title Schiff base, C(15)H(14)FN, the N=C bond length of 1.263 (2) Å is shorter than the N-C bond [1.426 (2) Å], indicating a typical imine double bond. Moreover, the C-N-C angle is 118.5 (2)°. The benzene rings form a dihedral angle of 51.22 (5)°.

The pair-defect-sum approximation to the bond strength of a hybrid orbital (angular wave functions only) is compared to the rigorous value as a function of bond angle for seven types of bonding situations, with between three and eight bond directions equivalent by geometrical symmetry operations and with only one independent bond angle. The approximation is seen to be an excellent one in all ca...

In the title compound, C(13)H(10)ClNO, the central C-N bond has considerable double-bond character and the N-O bond indicates a formal negative charge on the O atom. The mol-ecule is stabilized by an intra-molecular C-H⋯O hydrogen bond. The geometry about the C=N bond is Z [C-C-N-O torsion angle = -4.2 (3)°] and the phenyl and benzene rings are trans-oriented around the C=N bond. The phenyl and...