77027-39-5Relevant academic research and scientific papers
Synthesis and Characterization of Cyclometallated Complexes of Benzalazines. Crystal and Molecular Structure of 2>
Granell, Jaime,Sales, Joaquim,Vilarrasa, Jaume,Declercq, Jean P.,Germain, Gabriel,et al.
, p. 2441 - 2446 (1983)
The reaction of benzalazines, (p-RC6H4CH=N-)2 (R=H, Cl, NO2, or NMe2), with PdCl2 leads in the first two cases to the formation of cyclometallated polymeric species that react with phosphines to yield dimetallated compounds 2> (R'=Et or Ph) and/or .Phosphine exchange reactions give the complex 2>.The molecular structure of 2> has been determined by a single-crystal X-ray analysis.The crystals are monoclinic, space group P21/n, a=11.124(3), b=10.062(2), c=22.566(5) Angstroem, β=102.95(3) degree, and Z=2; R=0.052 for 3 306 reflections.Palladium atoms are five-co-ordinated, the Pd-N distance being 2.743 Angstroem.However, n.m.r. spectra show that, in solution, free rotation around the C(aromatic)-C(azomethine) bonds does occur even at -100 deg C.
3-Dimethylaminopropyl chalcogenolate complexes of palladium(II): Syntheses and characterization, including the crystal structures of [Pd(OAc)(ECH 2CH2CH2NMe2)]2· H2O (E = S, Se) and [PdCl(TeCH2CH2CH 2NMe2)]2
Dey, Sandip,Jain, Vimal K.,Varghese, Babu,Schurr, Thilo,Niemeyer, Mark,Kaim, Wolfgang,Butcher, Ray J.
, p. 1449 - 1457 (2008/10/09)
The reactions of the sodium salts of 3-dimethylamino-1- propylchalcogenolates, prepared by sodium borohydride reduction of (Me 2NCH2CH2CH2E)2 in methanol, with Na2PdCl4 yielded homoleptic [Pd(ECH 2CH2CH2NMe2)2] 6 (1) (E = S (1a); Se (1b); Te (1c)). When treated with [Pd(OAc) 2]3 or Na2PdCl4, compounds 1 readily gave binuclear redistribution products [PdX(ECH2CH 2CH2NMe2)]2 where X = OAc (2) (E = S (2a); Se (2b); or Cl (3)) (E = S (3a); Se (3b); Te (3c)), respectively. The terminal acetate/chloride ligands in 2b/3b can be substituted by other ionic ligands like PhSe-. The complexes were characterized by elemental analysis, UV-Vis, IR and NMR spectroscopy. The structures of 2a, 2b and 3c were established by X-ray crystallography. Each molecule has a dimeric structure in which there are two chalcogenolate bridges from the chelating 3-dimethylamino-1-propylchalcogenolate ligands. On pyrolysis, compound 2b affords Pd17Se15.
Structure and reactivity of (η3-indolylmethyl)palladium complexes generated by the reaction of organopalladium complexes with o-alkenylphenyl isocyanide
Onitsuka, Kiyotaka,Yamamoto, Mari,Suzuki, Shinobu,Takahashi, Shigetoshi
, p. 581 - 583 (2008/10/08)
Structure and reactivity of (η3-Indolylmethyl)palladium complexes generated by the reaction of organopalladium complexes with o-alkenylphenyl isocyanide were analyzed. The reaction of methylpalladium complexes with o-alkenylphenyl isocyanides r
Palladium-catalyzed insertion of 1,2- And 1,4-quinones into Si-Si bonds and its application to the modification of Si-Si-bond-containing polymers
Yamashita, Hiroshi,Reddy, N. Prabhakar,Tanaka, Masato
, p. 5223 - 5233 (2008/10/08)
Me3SiSiMe3 reacted with 1,2- and 1,4-quinones (p-benzoquinone (2a), its derivatives, 1,2-and 1,4-naphthoquinone, 9,10-phenanthraquinone (2f), 9,10-anthraquinone) in the presence of palladium catalysts to give the corresponding bis(trimethylsiloxy) aromatics in excellent to moderate yields. Active palladium catalysts were PdCl2L2 (L = tertiary phosphine) and Pd(dibenzylideneacetone)2-2P(OCH2)3CEt, among which PdCl2(PEt3)2 was in general the most efficient. A 1,2-disilacyclohexane cleanly underwent the reaction with 2f to form a 10-membered cyclic adduct. The reaction of Me3SiSiMe2SiMe3 with 2a also afforded p-(Me3SiO)2C6H4, via formal extrusion of a silylene unit. Treatment of cis-(PhMe2Si)2Pt(P-Me2Ph)2 with 2a gave p-(PhMe2SiO)2C6H4, indicative of the involvement of bis(silyl)palladium species in the catalysis. Quinones 2a,f smoothly underwent the palladium-catalyzed insertion into the Si-Si bonds of (SiMePhSiMePh-p-C6H4)n (9a), (SiMe2SiMe2CH2CH2)n, and (SiMe2SiMe2O)n to give partially or exhaustively modified polymers with arylenedioxy units incorporated in the backbones. A polysilane, (SiMe2)n, also reacted with 2a to provide a polymer with -SiMe2-O-p-C6H4-O- linkages. Upon UV irradiation, a partially modified polymer obtained from 9a and 2f showed a smaller extent of decrease in molecular weight than did the original polymer. Modification with 2f improved the thermal stability of 9a in thermogravimetric analysis.
Synthesis and characterization of tungsten oxo neopeniyiidene complexes1
Wengrovius, Jeffrey H.,Schrock, Richard R.
, p. 148 - 155 (2008/10/08)
Tantalum complexes of the type Ta(CHCMe3)X3(PR3)2 (X = Cl or Br) react with W(O)(OCMe3)4 to give [Ta(OCMe3)4X]2 and W(O)(CHCMe3)X2(PR
