CH NR Research Articles

Analysis of conformations of aliphatic alcohols and ethers

1. Taking into account the nonvalence interactions of the atoms, the torsion energy, and the reactions of the functional groups, we calculated the geometric conformations and the energies of the optimum conformations of the compounds CH2=CH(CH2)nR, where R = OH or OCH3, and n = 2–5. 2. In alcohols the most favorable conditions for the formation of an intramolecular hydrogen bond are realized when n = 2. In ethers the interaction of the unshared pairs of oxygen with the double bond can be realized in the coiled forms of molecules with n = 3, which is in agreement with their high reactivity. 3. The effect of replacing the hydrogen atoms by methyl groups on the potential energy of the molecules was discussed.

Trimethylplatinum(IV) complexes with ON bidentate ligands

Complexes of the trimethylplatinum(IV) moiety with bidentate monobasic salicylaldimines C 6H 5(OH)CHNR (R = ethyl, propyl, phenyl) have been prepared and characterized by IR, UV and NMR spectra and magnetic susceptibility measurements. The complexes are dimeric with double PtOPt bridges, and the metal appears to be pseudo-octahedrally hexacoordinated.

The reaction of N-alkyl substituted α-aminoisobutyronitriles with carbonyl compounds

Saturated and aromatic aldehydes react with Me 2(C(CN)NR 2 to give the corresponding R′CH(CN)NR 2. Saturated aldehydes do not react with Me 2C(CN)NHR but aromatic aldehydes yield Schiff bases (ArCHNR). α,β-Unsaturated aldehydes react with Me 2C(CN)NR 2 or Me 2C(CN)NMR to form RCH 2CHC(CN)NR 2 (in both possible geometric forms) or RCH 2CH 2C(CN)NR.