16743-23-0Relevant academic research and scientific papers
Investigation on the reactivity of dithiophosphonato/dithiophosphato NiII complexes towards 2,4,6-tris-2-pyridyl-1,3,5-triazine: Developments and new perspectives
Aragoni, M. Carla,Arca, Massimiliano,Crespo, Miriam,Devillanova, Francesco A.,Hursthouse, Michael B.,Huth, Susanne L.,Isaia, Francesco,Lippolis, Vito,Verani, Gaetano
, p. 2510 - 2520 (2009)
The reactions between tptz and differently substituted dithiophosphonato [Ni(ROpdt)2] [ROpdt = (RO)(4-MeOC6H4)PS 2-; R = Et (2); Pr (3); i-Pr (4); Bu (5)] and dithiophosphato [Ni((EtO)2PS2)2] (6) Ni II complexes have been investigated, and the characterisation of the resulting neutral mixed complexes (2·tptz)-(6·tptz) is reported. In all these complexes, tptz forces one of the two dithiophosphonato/ dithiophosphato ligands to behave as a monodentate ligand, a coordination mode rarely found in analogous NiII phosphorodithioato complexes. A comparison has been performed between the Ni-S bond distances of the new complexes and those of isologous dithiophosphonato, dithiophosphato and dithiophosphito NiII square-planar complexes, and of their penta- and hexa-coordinated adducts. The results, also supported by DFT calculations, are discussed and explained in terms of the structural trans-effect (STE). The reactivity of 2·tptz towards AgNO3 and CuSO4 to yield the complex [Ni(EtOpdt)(tptz)(H2O)]NO3 (7), and the dimer [(Ni(tptz)(μ-SO4)(H2O)]2· 6H2O (8), respectively, is consistent with the proposed bonding models.
1,2-Bis(diphenylphosphino)ethane nickel(ii) O,O′-dialkyldithiophosphates as potential precursors for nickel sulfides
Yadav, Reena,Singh, Ashish Kumar,Waghadkar, Yogesh,Kociok-K?hn, Gabriele,Kumar, Abhinav,Chauhan, Ratna,Rane, Sunit,Gosavi, Suresh
, p. 1327 - 1333 (2017)
In this work, three heteroleptic Ni(ii)dppe dithiophosphate complexes, [Ni{S2P(OC2H5)2}(dppe)]B(C6H5)4 (1), [Ni{S2P(OCH(CH3)2)2}(dppe)]PF6 (2) and [Ni{S2P(OCH(CH3)2)2}(dppe)]B(C6H5)4 (3) (dppe=1,2-bis(diphenylphosphino)ethane), have been synthesized and characterized by analytical and spectroscopic techniques (microanalysis, IR, UV-Vis,1H,13C and31P NMR spectroscopy) as well as single crystal X-ray crystallography. The crystal structures of all complexes displayed a distorted square planar geometry around the Ni(ii) center bonded through two sulfur atoms of the dithiophosphate ligand and two phosphorus atoms of dppe. The TGA results indicated that all three compounds display loss of solvents at the outset and decompose to Ni-S phase systems and hence may act as potential precursors for nickel sulfides. Investigations indicated that the bulkiness of counteranions as well as the alkyl fragment of the dithiophosphate ligands do not have any effect on the morphologies of as-synthesized nickel sulfides.
Alkyl transfer reactivity in the first octahedral isocyanide complex of nickel(II)
Boillos, Enmanuel,Miguel, Daniel
, p. 2568 - 2572 (2008/10/09)
[Ni{S2P(OEt)2}2] (1) reacts with 2 equiv of CNXyl (Xyl = 2,6-dimethylphenyl) to afford [Ni{S2P(OEt) 2}2(CNXyl)2] (2), which, as confirmed by X-ray crystallography, is the first octahedral isocyanide complex of Ni(II). Reaction of 2 with PCy3 (2 equiv) produces square-planar [Ni{S 2P(O)(OEt)}(PCy3)(CNXyl)] (3). When 2 is reacted with only 1 equiv of PCy3, the final product is the square-planar complex [Ni{S2P(O)(OEt)}(CNXyl)2] (4), containing two isocyanide ligands. Compound 4 reacts with 2-fold excess PCy3 to give 3 via isocyanide displacement. Both 3 and 4 contain one ethyldithiophosphate ligand, which is produced by the transfer of one ethyl group from a coordinated diethyl dithiophosphate of complex 2 to the leaving diethyl dithiophosphate ligand. Experimental evidence indicates that the phosphine plays a significant role in the alkyl transfer. Moreover, reaction of 1 with 2 equiv of N-p-tolyl-2- iminopyridine affords octahedral [Ni{S2P(OEt)2}{2-pyCH= NC6H4-Me-4}2][S2P-(OEt) 2] (5), in which both free and coordinated diethyl dithiophosphate coexist without any transfer of alkyl.
THE DIRECT ELECTROCHEMICAL SYNTHESIS OF DIALKYLDITHIOCARBAMATE AND DIETHYLDITHIOPHOSPHATE COMPLEXES OF MAIN GROUP AND TRANSITION METALS
Geloso, Corrado,Kumar, Rajesh,Lopez-Grado, Jaime Romero,Tuck, Dennis G.
, p. 928 - 932 (2007/10/02)
Dialkyldithiocarbamate derivatives (R2NCS2)nM of a number of metals (M=Fe, Co, Ni, Cu, Ag, Zn, Cd, In, Tl) have been synthesised in good yield by electrochemical oxidation of appropriate sacrificial anodes in non-aqueous solutions of either the corresponding tetraalkylthiuran disulphide (R2NCS2)2 (R=Me, Et) or a mixture of carbon disulphide plus the secondary amine R2NH (R=Et, i-Pr; R2NH=piperidine).Similar experiments with solutions of (EtO)2P(S)SH (=HL) gave MLn* derivatives (M=Fe, Co, Ni, Cu, Ag, Au, Zn, Cd, Hg, Ga, In, Tl) while in the presence of HL+1,10-phenanthroline, MLn.phen derivatives were obtained for M=V, Mn, Fe, Co, Zn, and Ga.
LIGAND EXCHANGE REACTIONS OF ANTIMONY(III) O,O-DISUBSTITUTED PHOSPHORODITHIOATES WITH NICKEL SALTS
McEwen, W. E.,Tien, J. H.,Kalbacher, B. J.
, p. 17 - 26 (2007/10/02)
Antimony(III) tris-(O,O-dialkyl phosphorodithioates) undergo ligand exchange reactions with nickel(II) chloride or nickel(II) octanoate in tetrahydrofuran solution to give nickel(II) bis-(O,O-dialkyl phosphorodithioates).The rates of the exchange reactions with nickel(II) chloride have been measured, and the rate constants can be correlated with polar substituent constants by use of the Taft-Hammett equation.The results suggest that the ligand exchange reactions occur by an initial SN2 type of attack of chloride ion on the antimony atom of the antimony(III) tris-(O,O-dialkyl phosphorodithioates).
