Unsymmetrical bidentate ligands of α-aminoaldimines leading to sterically controlled selectivity of geometrical isomerism in square planar coordination
alpha-aminoaldimines with the formula of Et(2)NCMe(2)CH[double bond, length as m-dash]NR (R = (i)Pr, (t)Bu, Ph) and their dichloro or diacetato complexes of Ni, Pd, Pt are prepared and structurally characterized. A nickelcomplex is in a distorted tetrahedral configuration, and the Pd and Pt complexes () are of square planar form. The alpha-aminoaldimines can chelate to the metal in a C(2)-unsymmetric bidentate
amine and imine has been studied. A class of new alpha-aminoaldimines and their nickel complexes [R(1)R(2)NCMe(2)CH[double bond, length as m-dash]N(2,6-R(3)(2)C(6)H(3))]NiBr(2) (R(1) = R(2) = Me, R(3) = Me (Ni-); R(3) = (i)Pr (Ni-); R(1) = R(2) = Et, R(3) = H (Ni-); Me (Ni-); (i)Pr (Ni-); R(1) = R(2) = (n)Pr, R(3) = (i)Pr (Ni-); (R(1)R(2)) = c-C(3)H(6) R(3) = (i)Pr (Ni-); (R(1)R(2)) = c-C(4)H(8), R(3)
Kirrmann et al., Bulletin de la Societe Chimique de France, 1958, p. 1469,1474
作者:Kirrmann et al.
DOI:——
日期:——
Synthesis and properties of O,O-dialkyl [1-hydroxy-3-(dialkylamino)-2,2-dimethylpropyl]phosphonates
作者:M. B. Gazizov、V. V. Zverev、R. A. Khairullin、R. R. Shagidullin、A. I. Alekhina、L. V. Avvakumova、V. I. Kovalenko、O. G. Sinyashin
DOI:10.1134/s1070363211040050
日期:2011.4
O,O-Dialkyl [1-hydroxy-3-(dialkylamino)-2,2-dimethylpropyl]phosphonates were prepared for the first time. By means of NMR H-1, IR spectroscopy and quantum-chemical calculations the presence in them of various H-bonds was established. In the crystalline state P=OaEuro broken vertical bar HO intermolecular hydrogen bonds favor the formation of cyclic dimer associates D (P=O). In the liquid state and concentrated solutions P=OaEuro broken vertical bar HO and NaEuro broken vertical bar HO intermolecular hydrogen bonds cause the formation of cyclic dimer associates D (P=O) and D-N, and intramolecular hydrogen bonds provide the existence of different conformations of the monomer form MN, the most stable among them with the non-strained six-membered aEuro broken vertical bar NCCCOHaEuro broken vertical bar ring.
Kirrmann; Duhamel, Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1959, vol. 249, p. 424