86,722 research outputs found
Crystal and molecular structures of h3-propenyl and h3-2-methyl propenyl-bis(triphenylphosphine) platinum (II) perchlorates
No full textCrystal and molecular structure of 2,3,6,7-tetramethoxy-9-trichloromethyl-10-carboxymethyl-9,10-dihydroanthracene
No full textCl3O6C21H21, Mr=475.75, orthorhombic, P212121, a=21.895(3), b=12.101(2), and c=8.237(2) Å, V=2182.4(7) Å3, Dx=1.45 g cm-3 for Z=4, λ(Mo Kα)=0.71069 Åμ=3.99 cm-1, F(000) 984, room temperature, R=0.035 for 1877 observed reflections. The molecule exhibits a folded conformation: the dihedral angle between the benzene rings is 28.3(1)°. The central ring is characterized by a cis diaxal configuration of hydrogen atoms in the 9, 10 positions, confirming the 13-C NMR results
Chloro and acetato complexes of platinum(II) with functionalized thioethers
No full textThe chloro complexes [PtCl2(RSR')(2)] (1-10) (RSR' = MeSCH2C(O)OMe, 1; MeSCH2C(O)OEt, 2; MeSCH2C(O)Omenthyl(-), 3: MeSCH2CH2C(O)OMe, 4; S(CH2)(3)CHC(O)OEt, 5; EtSCH2C(O)Me; 6; MeSCH C(O)Me, 7; MeSPh, 8; MeS-o-C6H4Me, 9; and MeS-o-C6H4Et, 10) are obtained in high yield (63-90%) by reaction of [PtCl2(PhCN)(2)] with the proper thioether in 1/2 molar ratio. in anhydrous chloroform. at reflux under argon for ca. 10 h. The X-ray crystal structure of [PtCl2(MeS-o-C6H4Me)(2)] (9) shows an almost regular trans square planar geometry (triclinic, space group P (1) over bar, a 6.806(1), b 7.789(2), c 10.085(3) Angstrom, alpha 101.80(2)degrees, beta 69.55(2)degrees, gamma 115.27(2)degrees, R(F-o) 0.023, R-w(F-o(2)) 0.065). The dichloro complexes react with silver acetate in a complex manner, which depends on the nature of the thioether, and only with RSR' = MeSPh the simple diacetato complex [Pt(OAc)(2)(RSR')(2)] is obtained as the major product
Synthesis, characterization and cytotoxic activity of substituted benzyl iminoether Pt(II) complexes of the type cis- and trans-[PtCl2{E-N(H)=C(OMe)CH2-C6H4-p-R}(2)] (R = Me, OMe, F). X-ray structure of trans-[PtCl2{E-N(H)=C(OMe)CH2-C6H4-p-F}(2)]
No full textNew substituted benzyl iminoether derivatives of the type cis- and trans-[PtCl2{E-N(H)=C(OMe)CH2-C6H4-p-R}(2)] (R = Me (1a, 2a), OMe (3a, 4a), F (5a, 6a)) have been synthesized and characterized by elemental analyses, FT-IR spectroscopy and NMR techniques. The iminoether ligands are in the E configuration, which is stable in solution and in the solid state, as confirmed by the H-1 NMR data. Complex trans-[PtCl2{E-N(H)=C(OMe)CH2-C6H4-p-F}(2)] (6a) was also characterized by an X-ray diffraction study. Complexes 1 a-6a have been tested against a panel of human tumor cell lines in order to evaluate their cytotoxic activity. cis-Isomers were significant more potent than the corresponding trans-isomers against all tumor cell lines tested; moreover, complexes la and 5a showed IC50 values from about 2-fold to 6-fold lower than those exhibited by cisplatin, used as reference platinum anticancer drug
Synthesis, characterization and reactivity of trans-[Pd(COOCH3)(H2O)(PPh3)2](TsO) [TsO =p-toluenesulfonate]: its role in the catalytic hydroesterification of olefins
No full textSynthesis, characterization and X-ray structure of trans-[Pd(COOCH3)(H2O)(PPh3)2](TsO), a possible intermediate in the catalytic hydroesterification of olefins (TsO=p-toluenesulfonate)
No full textSynthesis and characterization of Zr(IV) and Y(III) complexes with monocyclopentadienyl ligands containing an additional site tethered by a coordinating 2,6-pyridine bridge. X-ray crystal structures of the zirconium complexes
No full textConvenient synthesis of cationic allylplatinum(II) complexes with tertiary phosphines by oxidative allyl transfer from ammonium cations to platinum(0) substrates. Crystal and molecular structures of eta(3)-propenyl- and eta(3)-2-methylpropenyl-bis-(triphenylphosphine)platinum(II)perchlorate
No full textA large variety of cationic eta(3)-allylplatinum(II) complexes of the type [Pt(eta(3)-CH2C(R)C(R')(R ")(PPh3)(2)](+)(1a-f) are prepared in high yield by oxidative allyl transfer from the ammonium cations [NEt3CH2C(R) C(R')(R ")](+) to [Pt(eta(2)-C2H4)(PPh3)(2)]. A similar reaction of [NEt3CH2C(R)-C(R')(2)](+) with [Pt(cod)(2)] yields the related complexes [Pt(eta(3)-CH2C(R)C(R')(2)(cod)](+) (2a-c), indicating a rather general feasibility of such synthetic route. The 1,5-cyclooctadiene ligand of complexes 2a,e can be easily displaced by mono- and bidentate tertiary phosphines. The solution behaviour of the cationic eta(3)-allyl platinum(II) complexes has been studied by multinuclear NMR spectroscopy. The solid state structures of the complexes [Pt(eta(3)-CH2CHCH2)(PPh3)(2)](+) (1a) and [Pt(eta(3)-CH2C(Me)CH2)(PPh3)(2)](+) (1b) have been determined by X-ray analyses. In Ib, the 2-methylpropenyl ligand is symmetrically eta(3)-bound to platinum and assumes a unique orientation relative to the average coordination plane. In la, however, the propenyl ligand is disordered in two opposite orientations with occupation factors of 0.65 and 0.35. In the orientation with 0.65 occupation factor, the allyl ligand is symmetrically eta(3)-bound to the metal, whereas, in the opposite orientation the C-C bond distances within the allyl group are considerably different [1.46(4) and 1.23(4) Angstrom] with the three allyl carbon atoms being at roughly equal distances from platinum. Even though the C3H5 group is affected by large anisotropic thermal motion, the observed asymmetry may also arise from a prevailing eta(1), eta(2) coordination of the ligand in the solid
Cyclic dialkylindium amides: new structural information and ultra-purification using inorganic and inorgano–organic layered materials
No full textHydridocarbene Complexes of Platinum(II) Derived from Electrophilic Cleavage of C-F Bonds in Hydridotrifluoromethyl Compounds by Proton Acids
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