113377-86-9Relevant academic research and scientific papers
Palladium (II) complexes of hybrid phosphine - Phosphine oxide ligands
Coyle, Randy J.,Slovokhotov, Yuri L.,Antipin, Mikhail Yu.,Grushin, Vladimir V.
, p. 3059 - 3070 (2008/10/09)
Complexes of the type [L2PdCl2] , where L = Ph2PCH2P (O) Ph2 (dppmO) , Ph2P (CH2) 2P (O) Ph2 (dppeO) , Ph2P (CH2) 3P (O) Ph2 (dpppO) , Ph2P (CH2) 4P (O) Ph2 (dppbO) , and Ph2PC5H4FeC5H4P (O) Ph2 (dppfcO) , were prepared in high yield from Na2 [PdCl4] and 2 equiv. of the corresponding L in dichloromethane-methanol. All complexes, except for [ (dppfcO) 2PdCl2] , can exist as the cis and trans isomers, or mixtures of both, with the cistrans ratio decreasing in media of low polarity. The ferrocene containing complex, [ (dppfcO) 2PdCl2] , appeared to be exclusively trans in both the solid state and solution, as established by single crystal X-ray diffraction of its 1 : 3 benzene solvate. The ion exchange extraction of dichloromethane solutions of [ (dppmO) 2PdCl2] and [ (dppeO) 2PdCl2] with aqueous NaBF4 furnished the corresponding cationic P,O-chelates, cis- [ (dppmO) 2Pd] 2 (BF-4)2 and cis- [ (dppeO) 2Pd] 2 (BF-4)2. Alternatively, these cations can be generated by the reaction between the chloro complexes, [ (dppmO) 2PdCl2] and [ (dppeO) 2PdCl2] , with Ag+. Single crystal X-ray diffraction of cis- [ (dppeO) 2Pd] 2 (BF-4)2 revealed distinct conformations (a puckered chair and a distorted sofa) for the two chelate rings situated around each Pd atom. A polymeric, poorly soluble material, { [ (dpppO) 2Pd] 2 (BF-4)2}n, was isolated from the reaction between [ (dppO) 2PdCl2] and AgNO3 NaBF4, with both coordinated and free phosphoryl groups being present in the product (IR) . In dilute solutions of the { [ (dpppO) 2Pd] 2 (BF-4)2}n, depolymerization occurred, giving rise to the monomeric cationic chelate, cis- [ (dpppO) 2Pd] 2(BF-4)2.
Organometallic chemistry of the lanthanides: 1H and 31P NMR studies of the coordination of bifunctional ligands OPPh2CH(R)PPh2 to neodymium derivatives. Access to heterobimetallic complexes.
Visseaux, M.,Dormond, A.,Baudry, D.
, p. 173 - 184 (2007/10/02)
Neodymium compounds give rise to stable adducts upon treatment with phosphine oxides. 31P NMR is found to be of special interest for the study of such paramagnetic complexes.The bifunctional ligands OPPh2CH(R)PPh2 are used to build heterobimetallics.Key Words: heterobimetallics / neodymium / bifunctional ligand: phosphine-phosphine oxide / 31P NMR
