29421-07-6Relevant academic research and scientific papers
Concomitant polymorphism and conformational polymorphism in diiodobis[1,2-bis(diphenylphosphino)ethane]platinum(II)
Rath, Nigam P.,Kumar, V.S. Senthil,Janka, Mesfin,Anderson, Gordon K.
, p. 2997 - 3001 (2007)
The title organometallic compound crystallizes in two different polymorphic modifications. The conformational differences between the two crystalline modifications lead to differences in crystal packing and thus result in the formation of the two polymorp
The Reactivity of Phosphanylphosphinidene Complexes of Transition Metals Toward Terminal Dihaloalkanes
Chojnacki, Jaros?aw,Grubba, Rafa?,Ordyszewska, Anna,Pikies, Jerzy,Szynkiewicz, Natalia
, (2020)
The reactivities of phosphanylphosphinidene complexes [(DippN)2W(Cl)(η2-P-PtBu2)]- (1), [(pTol3P)2Pt(η2-P═PtBu2)] (2), and [(dppe)Pt(η2-P═PtBu2)] (3) toward dihaloalkanes and methyl iodide were investigated. The reactions of the anionic tungsten complex (1) with stochiometric Br(CH2)nBr (n = 3, 4, 6) led to the formation of neutral complexes with a tBu2PP(CH2)3Br ligand or neutral dinuclear complexes with unusual tetradentate tBu2PP(CH2)nPPtBu2 ligands (n = 4, 6). The methylation of platinum complexes 2 and 3 with MeI yielded neutral or cationic complexes bearing side-on coordinated tBu2P-P-Me moieties. The reaction of 2 with I(CH2)2I gave a platinum complex with a tBu2P - P - I ligand. When the same dihaloalkane was reacted with 3, the P - P bond in the phosphanylphosphinidene ligand was cleaved to yield tBu2PI, phosphorus polymers, [(dppe)PtI2] and C2H4. Furthermore, the reaction of 3 with Br(CH2)2Br yielded dinuclear complex bearing a tetraphosphorus tBu2PPPPtBu2 ligand in the coordination sphere of the platinum. The molecular structures of the isolated products were established in the solid state and in solution by single-crystal X-ray diffraction and NMR spectroscopy. DFT studies indicated that the polyphosphorus ligands in the obtained complexes possess structures similar to free phosphenium cations tBu2P+═P-R (R = Me, I) or (tBu2P+═P)2.
Studies on reactivity of platinum-based heterobimetallic carbonyl clusters
Venkatesh, Sadhana,Sravani, Chinduluri,Steby,Vijayakrishna, Kari,Sivaramakrishna, Akella
, p. 1156 - 1166 (2015/04/14)
Reactivity of platinum-based trinuclear carbonyl clusters of the type L2PtRu2(CO)8, where L2 = 1,3-bis(diphenylphosphino)propane (dppp) and 1,2-bis(diphenylphosphino)ethane (dppe), is described. Oxidative additi
Tin(II) halide insertion or halogen exchange in the reactions of dihaloplatinum(II) complexes with tin(II) halide
Momeni, Badri Z.,Kazmi, Hoori,Najafi, Atefeh
, p. 1618 - 1627 (2011/10/31)
Reactions of SnCl2 with the complexes cis-[PtCl 2(P2)] (P2=dppf (1,1′- bis(diphenylphosphino)ferrocene), dppp (1,3-bis(diphenylphosphino)propane=1, 1′-(propane-1,3-diyl)bis[1,1-diphenylphosphine]), dppb (1,4-bis(diphenylphosphino)butane=1,1′-(butane-1,4-diyl)bis[1, 1-diphenylphosphine]), and dpppe (1,5-bis(diphenylphosphino)pentane=1,1′- (pentane-1,5-diyl)bis[1,1-diphenylphosphine])) resulted in the insertion of SnCl2 into the Pt-Cl bond to afford the cis-[PtCl(SnCl 3)(P2)] complexes. However, the reaction of the complexes cis-[PtCl2(P2)] (P2=dppf, dppm (bis(diphenylphosphino)methane=1,1′-methylenebis[1,1-diphenylphosphine]), dppe (1,2-bis(diphenylphosphino)ethane=1,1′-(ethane-1,2-diyl)bis[1,1- diphenylphosphine]), dppp, dppb, and dpppe; P=Ph3P and (MeO) 3P) with SnX2 (X=Br or I) resulted in the halogen exchange to yield the complexes [PtX2(P2)]. In contrast, treatment of cis-[PtBr2(dppm)] with SnBr2 resulted in the insertion of SnBr2 into the Pt-Br bond to form cis-[Pt(SnBr3) 2(dppm)], and this product was in equilibrium with the starting complex cis-[PtBr2(dppm)]. Moreover, the reaction of cis-[PtCl 2(dppb)] with a mixture SnCl2/SnI2 in a 2 : 1 mol ratio resulted in the formation of cis-[PtI2(dppb)] as a consequence of the selective halogen-exchange reaction. 31P-NMR Data for all complexes are reported, and a correlation between the chemical shifts and the coupling constants was established for mono- and bis(trichlorostannyl) platinum complexes. The effect of the alkane chain length of the ligand and SnII halide is described. Copyright
Preparation and some properties of Pt(II) ruthenocenylacetylide complexes
Sato, Masaru,Mogi, Emiko
, p. 159 - 167 (2007/10/03)
Ruthenocenylacetylene reacted with trans-PtI(C6H4X-p)(PPh3)2 (X = H, Me, OMe, Cl or CO2Me) in the presence of CuI in diethylamine-CH2Cl2 to give the Pt(II) ruthenocenylacetylide complexes, trans-Pt(C=CRc) (C6H4X-p)(PPh3)2 with a good yield. Similarly, cis-Pt(C=CRc)(C6H4OMe-p)(dppe) was prepared. The structure of trans-Pt(C=CRc)(C6H4CO2Et-p)(PPh3)2 was determined by single-crystal X-ray diffraction. No reaction of the trans isomers with DDQ or AgBF4 took place, while the cis isomer was oxidized with AgBF4 to give the coupling products RcC=CC6H5OMe-p with a low yield. The oxidation of the cis isomer with iodine occurred on the Pt atom to afford p-MeOC6H4I and PtI2(dppe) as the main products.
Photochemical reactions of diphosphineplatinum(II) oxalate complexes
Anderson, Gordon K.,Lumetta, Gregg J.,Siria, Jeffrey W.
, p. 253 - 259 (2007/10/02)
Irradiation at 254 nm of CH3CN/C6H6 or PhCn solutions of produces 2 equiv. of CO2, and in the presence of PhCl or PhI yields .With CO or PhCCPh the products are or CPh)(dppe)>, but in the latter case extended photolysis yields CPh)(dppe)>.Photolysis in the presence of H2 gives a mixture of the + and + cations.Simple elimination of CO2 does not occur in all cases, as illustrated by the formation of when is photolyzed in the presence of methanol.Photochemical reactions of the related complexes (L2 = dppm, dcpe) are also described.
Tri- and tetra-metallic complexes containing phospha-alkyne ligands. First examples of μ3(η2-) bonded phospha-alkynes; crystal and molecular structure of
Al-Resayes, Saud I.,Hitchcock, Peter B.,Meidine, Mohamed F.,Nixon, John F.
, p. 457 - 472 (2007/10/02)
A new μ3(η2-) coordination mode for a phospha-alkyne has been established in the complexes and (CO)10(Me3CCP)>.
Chemistry of Platinum Sulphido-complexes. Part 3. Crystal and Molecular Structure of Tetrasulphidoplatinum(II) and a Study of its Bonding and Reactions
Briant, Clive E.,Calhorda, Maria J.,Hor, T. S. Andy,Howells, Nigel D.,Mingos, D. Michael P.
, p. 1325 - 1330 (2007/10/02)
The structure of has been determined by single-crystal X-ray techniques using deffractometer data.The compound crystallises in the monoclinic space proup P21/a, with four molecules in a cell of dimensions a=9.736(3), b=30.964(7), c=9.806(5) Angstroem, and β=117.81(4) deg.Least-squares refinement of the structure led to a final R value of 0.043 using 3292 observed intensities.The complex is approximately square planar and the tetrasulphido-ligand behaves as a dianionic chelating ligand.The resultant PtS4 ring adopts an approximately C2 conformation.The central S-S bond is 0.046 Angstroem shorter than the outer S-S bonds .A molecular orbital analysis of the bonding in this and related complexes has been used to interpret this geometric feature.
THE PHOTODECOMPOSITION OF PLATINACYCLOALKANES IN SOLUTION II. 1,4-BUTANEDIYLPLATINUM(II) AND (IV) COMPOUNDS
Perkins, Duncan C.L.,Puddephatt, Richard J.,Tipper, Charles F.H.
, p. 481 - 488 (2007/10/02)
The products of the photolysis of a number of platinacyclopentanes is solution at 25 deg C under a variety of conditions have been determined.With (L = PMe2Ph, PPh3) in CH2Cl2, CH2Br2 and (CH3)2SO the hydrocarbon products are exclusively ethylene and but-1-ene.Formation of the latter through a 1,3-hydrogen shift is preceded by phosphine ligand dissociation.The photolysis of gave methane, ethylene, but-1-ene and n-pentane together with a little n-butane, the methane being formed from internal hydrogen abstraction by the CH3 group in the excited reactant molecule.Photodecomposition of the platinum(II) compounds (L = (PMe2Ph)2, (PPh3)2, Ph2PCH2CH2PPh2) gave ethylene, but-1-ene, pent-1-ene (with the halogenated solvents) and with some systems appreciable yields of n-butane, the latter being the result of internal abstraction of two hydrogen atoms by the C4H8 moiety.The formation of pentene is probably preceeded by the addition of CH2Cl2 or CH2Br2 to the excited reactant molecule.Addition of diphenylphosphine promotes the production of n-butane.
