1,721,033 research outputs found
NEW MOLECULAR-HYDROGEN IRON(II) COMPLEXES - SYNTHESIS, CHARACTERIZATION, AND REACTIVITY WITH ARYLDIAZONIUM CATIONS
No full textDihydrogen complexes of the type [FeH(η2-H2)P4]BPh4[P = PhP(OEt)2 and P(OEt)3] were prepared by allowing the dihydride FeH2P4 to react at -80 °C with HBF4•Et2O in ethanol. Variable-temperature 1H and 31P{1H} NMR spectra and T1 measurements of the complexes are reported. Ligand-substitution reactions with CO, isocyanide, nitrile, and phosphite afforded the new monohydrides [FeHLP4]BPh4 [L = CO, 4-CH3C6H4NC, 4-CH3OC6H4NC, 4-ClC6H4NC, 2,6-(CH3)2C6H3NC, 4-CH3C6H4CN, CH3(CH2)2CN, P(OEt)3, and PhP(OEt)2]. Furthermore, the reactivity with aryldiazonium cations of both molecular hydrogen [FeH(η2-H2)P4] +and hydride [FeHLP4]+derivatives was examined and led to the synthesis of bis-(aryldiazenido) [Fe(ArN2)2P3]2+(Ar = 4-CH3C6H4and 4-CH3OC6H4) and monodiazene [Fe(ArN=NH)LP4]2+ (L = nitrile) complexes, respectively. Their characterization by infrared, 1H, and 31P{1H} NMR data is also reported. © 1989, American Chemical Society. All rights reserved
Arenediazonium Complexes of Cobalt(I): Synthesis and Properties
No full textArenediazonium complexes of cobalt(I) of the type [Co(RN2)L4] [BPh4]2 [L = P(OEt)2Ph, P(OEt)3, or P(OMe)3; R = 4-CH3C6H4, 3-CH3C6H4, 2-CH3C6H4, C6H5, 4-CH3OC6H4, 4-ClC6H4, or 4-FC6H4] have been prepared; their characterization by i.r., 1H, and 31P-{1H} n.m.r. spectra is reported. Reactivity with π-acceptor ligands such as CO, NO, isocyanide, and phosphite is also described. Finally, the reaction of the arenediazonium complexes with chloride ions affording the cobalt(II) derivatives [CoClL4]+ has been investigated; the function of RN2 as an oxidizing agent in this reaction is also discussed
Preparation and Properties of New Pentacoordinate Iron Nitrosyl Complexes
No full textOur interest in the chemistry of the nitrosyl complexes has been mainly devoted to the use of monodentate phosphite as coligand, and in this context, the syntheses of pentacoordinate {Co(NO)}8 complexes1 of the type [CoXL3(NO)]+ and [CoL4(NO)]2+ have recently been reported.2 Similar investigations carried out on iron(II) halides by using gaseous NO allowed us to obtain new pentacoordinate [FeL4(NO)]+ (L = phosphite) derivatives, which are described in the present report. Furthermore, whereas some iron nitrosyl compounds also containing CO have been described, 3 no example of iso-cyanide-phosphine derivatives known to us has yetbeen reported. Therefore, in this paper we also present the reactivity of the [FeL4(NO)]+ species with isocyanides, leading to the synthesis of the first nitrosyl isocyanides-phosphite mixedligand complexes. © 1984, American Chemical Society. All rights reserved
Preparation of dinitrogen complexes Mo(N2)2P4 stabilised by phosphonite PPh(OEt)2 and phosphinite PPh2(OEt) ligands
No full textSYNTHESIS AND REACTIVITY OF RUTHENIUM(II) HYDRIDE COMPLEXES STABILIZED BY TRIS(PYRAZOLYL)BORATE AND PHOSPHITE LIGANDS
No full textMonocarbonyl Complexes of Iron(II): Preparation and Properties
No full textIron(II) monocarbonyl complexes of the type [FeX(CO)L4]BPh4 [X = Cl or Br; L = P(OMe)3′ P(OEt)3′ or PPh(OEt)2] and the dicarbonyl compound [FeBr(CO)2{PPh(OEt)2}3] BPh4 have been prepared and characterized by i.r.,1H and 31P-{1H} n.m.r. spectroscopy. Reactivity with some π-acceptor ligands has been investigated and synthesis of the new derivatives [FeBr(4-Me-C6H4NC)3L2]+ [L = P(OMe)3′ P(OEt)3′ or PPh(OEt)2] achieved
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