736141-91-6

Upstream product

• 19172-47-5 Lawessons reagent 
• 67-56-1 methanol 
• 83864-14-6 nickel dichloride 
• 100-66-3 methoxybenzene 

Downstream Products

• 943720-33-0 [Ni(MeOpdt)2(2,4,6-tris(2-pyridyl)-1,3,5-triazine)]*MeOH 
• 377737-42-3 [Ni(O-methyl-(4-methoxyphenyl)phosphonodithioato)2(m-aminopyridine)2] 
• 377737-41-2 [Ni(O-methyl-(4-methoxyphenyl)phosphonodithioato)2(o-aminopyridine)2] 

Relevant academic research and scientific papers

Triphenylphosphine-Assisted Transformation of NiS to Ni2P through a Solvent-Less Pyrolysis Route: Synthesis and Electrocatalytic Performance

Straightforward synthetic routes to the preparation of transition metal phosphides or their chalcogenide analogues are highly desired due to their widespread applications, including catalysis. We report a facile and simple route for the preparation of a pure phase nickel phosphide (Ni2P) and phase transformations in the nickel sulfide (NiS) system through a solvent-less synthetic protocol. Decomposition of different sulfur-based complexes (dithiocarbamate, xanthate, and dithiophosphonate) of nickel(II) was investigated in the presence and absence of triphenylphosphine (TPP). The optimization of reaction parameters (nature of precursor, ratio of TPP, temperature, and time) indicated that phosphorus- and sulfur-containing inorganic dithiophosphonate complexes and TPP (1:1 mole ratio) produced pure nickel phosphide, whereas different phases of nickel sulfide were obtained from dithiocarbamate and xanthate precursors in the presence or absence of TPP. A plausible explanation of the sulfide or phosphide phase formation is suggested, and the performance of Ni2P was investigated as an electrocatalyst for supercapacitance and overall water-splitting reactions. The performance of Ni2P with the surface free of any capping agents is not well explored, as common synthetic methods are solution-based routes; therefore, the electrocatalytic performance was also compared with metal phosphides, prepared by other routes. The highest specific capacitance of 367 F/g was observed at 1 A/g, and the maximum energy and power density of Ni2P were calculated to be 17.9 Wh/kg and 6951 W/kg, respectively. The prepared nickel phosphide required overpotentials of 174 and 316 mV along with Tafel slopes of 115 and 95 mV/dec to achieve a current density of 10 mA/cm2 for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER), respectively.

Solvent-free mechanochemical synthesis of dithiophosphonic acids and corresponding nickel(II) complexes

We report a green chemistry route for dithiophosphonic acids of the type [HS2P(OR)(4-MeOC6H4)] [R = H, (1); Me (2); Et (3); iPr (4)]. The different dithiophosphonic acids formed through the stoichiometric addition of water or alcohols to Lawesson’s Reagent (molar ratio 2:1), followed by an intimate grinding of themixture (mechanochemistry). The products formed without the use of solvent or external heat in less than 5 minutes. The acids are formed with 100% atomeconomy, and because they form in essentially quantitative yield, are also formed with >98% atom efficiency and an E-factor = 0, because no waste is produced. Of importance is that this methodology is different from conventional methods in forming dithiophosphonic acids where the use of organic solvents, added heat, long reaction times and lower yields are commonplace. We further demonstrate that nickel(II) complexes can form directly from the in situ generated acids. Thus, the reaction between 1–4 and NiCl2 · 6 H2O (molar ratio 2:1) lead to complexes of the type [Ni{S2P(OR) (4-MeOC6H4)}2] [R = H, (5);Me (6); Et (7); iPr (8)] with no use of organic solvent. All compounds were characterized or verified by a combination of 1H, 31P NMR, elemental analysis (solids), and FT-IR.

Synthesis and structure of [An(RO)PS2]- complexes

Reaction of An(S)PS2P(S)An with NaOR [R = Me, Et, t Pr] gives the non-symmetric phosphonodithioato anions [An(RO)PS 2]- which can be complexed to a range of metals. The group 10 metals (Ni, Pd and Pt) adopt square planar ML2 complexes. The zinc and cadmium complexes adopt isostructural dimeric M2L 4 structures whilst mercury complexes adopt a subtly different dimeric motif. Two distinctly different lead complexes are reported, one consisting of PbL2 units joined by Pb...S interactions to form distinct dimeric pairs, the other being a completely new structural motif for complexes of this type, PbL2 units held together by covalently bonded bridging ligands to form an infinite polymeric chain structure. All new compounds have been characterised spectroscopically and nine demonstrative X-ray structures are reported.

Four novel sulfur-rich complexes: Syntheses, crystal structures of three nickel(II) and one cobalt(II) complex with derivatives of Lawesson's Reagent

The reaction of 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4- disulfide (Lawesson's Reagent, LR) with NiCl2 or Co(CH 3COO)2 in methanol or ethanol gives novel sulfur-rich complexes: C16H20

New perspectives in phosphonodithioate coordination chemistry. Synthesis and X-ray crystal structure of trans-bis-[O-ethyl-(4-methoxyphenyl)phosphonodithioato] nickel(II)

Attempts to optimise the synthesis of a new class of nickel(II) dithiolene complexes starting from 1,3-dialkylimidazolidine-2-thione-4,5-dione (1) and Lawesson's reagent (2) have afforded a new and easy one-step synthesis of phosphonodithioate nickel(II) complexes. This consists of the direct reaction between NiCl2 and Lawesson's reagent in the appropriate alcohol R′OH (R=Me, Et, i-Pr, Bu, Bz) as solvent, to give the bis-[O-alkyl/aryl-(4-methoxyphenyl)phosphonodithioato] nickel(II) complexes (5a-e) with high yields (64-91%). Among them, trans-bis-[O-ethyl-(4-methoxyphenyl)phosphonodithioato] nickel(II) (5b) was characterised by means of X-ray diffraction measurements on a single crystal. The compound crystallises in the triclinic, P1 space group with a=6.4840(7), b=7.6032(9), c=13.055(2) A, α=99.481(9), β=99.43(1), γ=104.487(9)° and Z=1. The compound is centrosymmetric and exhibits discrete monomeric units with the ligand acting as S,S-bidentate. To explain the reactivity of Lawesson's reagent, the formation of 4-methoxyphenyldithiophosphorane (6) as intermediate has been suggested. The reaction was also tested for Pd(II) and Pt(II), but in these cases the yields were not as satisfactory as for Ni(II).