5035-79-0Relevant articles and documents
Copper Lanthanide Phosphonate Cages: Highly Symmetric {Cu3Ln9P6} and {Cu6Ln6P6} Clusters with C 3v and D3h Symmetry
Moreno Pineda, Eufemio,Heesing, Christian,Tuna, Floriana,Zheng, Yan-Zhen,McInnes, Eric J.L.,Schnack, Jürgen,Winpenny, Richard E.P.
, p. 6331 - 6337 (2015)
Two families of copper lanthanide phosphonate clusters have been obtained through reaction of [Cu2(O2CtBu)4(HO2CtBu)2] and either Ln(NO3)3·nH2O or [Ln2(O2CtBu)6(HO2CtBu)6] and tert-butylphosphonic acid or an amino-functionalized phosphonic acid. The clusters, with general formula [Cu(MeCN)4][Cu3Ln9(μ3-OH)7(O3PtBu)6(O2CtBu)15] and [Cu6Ln6(μ3-OH)6(O3PC(NH2)Me2)6(O2CtBu)12], were structurally characterized through single crystal X-ray diffraction and possess highly symmetric metal cores with approximately C3v and D3h point symmetry, respectively. We have investigated the possible application of the isotropic analogues in magnetic cooling, where we were able to observe that up to around 70% of the theoretical magnetic entropy change is obtained. Simulation of the magnetic data shows antiferromagnetic coupling between the spin centers, which explains the magnetic entropy value observed. (Chemical Equation Presented).
Synthesis of α-substituted α-aminophosphinic and α-aminophosphonic acids
Osipova,Belyankin,Khomutov,Zhukov,Khurs,Khomutov
, p. 2588 - 2591 (1996)
The reaction of ketoximes with hypophosphorous acid resulted in previously unknown α-substituted-α-aminophosphimc acids, which were oxidized into the corresponding α-substituted-α-aminophosphonic acids.
Synthesis of phosphinic and phosphonic analogs of aspartic acid
Khomutov,Osipova,Khurs,Alferov,Khomutov
, p. 1961 - 1964 (2007/10/03)
Approaches to the synthesis of 1-amino- and 2-amino-2-carboxyethylphosphinic and -phosphonic acids have been studied. A convenient method for the preparation of phosphinic acids is the reactions of ethyl diethoxymethylphosphonite with ethyl acetamidomethylenemalonate and ethyl 2-acetamidoacrylate.
The Synthesis of 1-Aminoalkylphosphonic Acids. A Revised Mechanism of the Reaction of Phosphorus Trichloride, Amides and Aldehydes or Ketones in Acetic Acid (Oleksyszyn Reaction)
Soroka, Miroslaw
, p. 331 - 334 (2007/10/02)
The mechanism of the amidoalkylation of trivalent phosphorus compounds in acetic acid has been reinvestigated.Evidence is presented that 1-(acylamino)alkyl acetates 5 and not N,N'-alkylidenebisamides 2 are the intermediates in this reaction.Supporting literature analogies are discussed.This paper also describes a convenient procedure for the preparation of crude (acylamino)alkyl alkanoates 5, which are excellent amidoalkylating agents.The usefulness of these reagents is demonstrated by a simple two-step "one pot" synthesis of 1-aminoalkylphosphinic acids 1.
