共查询到20条相似文献,搜索用时 31 毫秒
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The thermally unstable compound [Hg[P(C(6)F(5))(2)](2)] was obtained from the reaction of mercury cyanide and bis(pentafluorophenyl)phosphane in DMF solution and characterized by multinuclear NMR spectroscopy. The thermally stable trinuclear compounds [Hg[(mu-P(CF(3))(2))W(CO)(5)](2)] and [Hg[(mu-P(C(6)F(5))(2))W(CO)(5)](2)] are isolated and completely characterized. The higher order NMR spectra exhibiting multinuclear satellite systems have been sufficiently analyzed. [Hg[(mu-P(CF(3))(2))W(CO)(5)](2)].2DMF crystallizes in the monoclinic space group C2/c with a = 2366.2(3) pm, b = 1046.9(1) pm, c = 104.0(1) pm, and beta = 104.01(1) degrees. Structural, NMR spectroscopic, and vibrational data prove a weak coordination of the two DMF molecules. Structural, vibrational, and NMR spectroscopic evidence is given for a successive weakening of the pi back-bonding effect of the W-P bond in the order [W(CO)(5)PH(R(f))(2)], [Hg[(mu-P(R(f))(2))W(CO)(5)](2)], and [W[P(R(f))(2)](CO)(5)](-) with R(f) = C(6)F(5) and CF(3). The pi back-bonding effect of the W-C bonds increases vice versa. 相似文献
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H. Böhland W. Hanay M. Noltemeyer A. Meller H. G. Schmidt 《Analytical and bioanalytical chemistry》1998,361(6-7):725-728
[Be(NCS)2(C5H5N)2] was prepared and characterized by chemical analysis, FT-IR-analysis, and single crystal X-ray structure analysis. The crystals are orthorhombic with a = 829.30(10) pm, b = 1292.1(2) pm, c = 1313.40(10) pm, space group Pnma. Z = 4. The structure is built up from tetrahedra. Hydrogen bonding between the S-atom of one Be-N-bonded thiocyanate and 1.3-H-atoms of pyridine ligands yield a three dimensional network consisting of folded sheets. 相似文献
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P.H.M. Budzelaar J. Boersma G.J.M. van Der Kerk A.L. Spek A.J.M. Duisenberg 《Journal of organometallic chemistry》1985,287(1):c13-c17
[μ-Ni(C5H5)P(C6H5)3] [μ-C5H5]2 [ZnC5H5]2 has been obtained from the reaction of Cp2Zn with Ni(COD)2 in the presence of Ph3P and its structure determined by X-ray crystallography. It consists of two cyclopentadienylzinc moieties bridged by the Ni atom of a CpNiPPh3 group and by a Cp group. A possible mechanism for the formation of the compound is discussed. 相似文献
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A redox-active diiron complex with the diethynylated dithienylethene (DTE) linker, (dppe)(eta(5)-C(5)Me(5))Fe-C[triple bond, length as m-dash]C-DTE-C[triple bond, length as m-dash]C-Fe(eta(5)-C(5)Me(5))(dppe), shows photochromic behaviour, which switches on and off the communication performance between the two metal centres. 相似文献
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Spectroscopic Investigations of the Iron(II) Nitrosodicyanomethanide and Nitrosocarbamoylcyanomethanide Complexes [Fe(NOC(CN)2)2(C5H5N)4] and [Fe(NOC(CN)C(O)NH2)2(C5H5N)2] The syntheses of new iron(II) complexes of the nonlinear pseudohalides [NOC(CN)2]? and [NOC(CN)C(O)NH2]? is reported. The Structures of the compounds are discussed on the basis of IR, Mößbauer, 13C, and 14N NMR spectra as well as of the results of magnetic measurements. 相似文献
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Dr. Frédéric Aribot Amélie Merle Dr. Pierre Dechambenoit Dr. Harald Bock Dr. Albert Artigas Dr. Nicolas Vanthuyne Dr. Yannick Carissan Dr. Denis Hagebaum-Reignier Dr. Yoann Coquerel Dr. Fabien Durola 《Angewandte Chemie (International ed. in English)》2023,62(28):e202304058
A rigid propeller-shaped conjugated triple macrocycle consisting of two nearly perfectly stacked benzene rings and three linking [5]helicene moieties has been synthesized using a glyoxylic Perkin approach. Analysis of the electron delocalization in this atypical aromatic molecule revealed global aromaticity and a 78 π-electron circuit along the edge of its triple loop, to the detriment of the two 6 π-electron circuits in the two stacked benzene rings. 相似文献
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O. V. Sizova N. V. Ivanova V. I. Baranovskii A. B. Nikolskii 《Journal of Structural Chemistry》1994,35(4):433-442
The electronic structure and spectra of [Ru(NH3)5pyz]2+ and [(NH3)5Ru-pyz-Ru(NH3)5]4+ are calculated by the INDO (CINDO-E/S) method. Changes in molecular orbitals, charge distributions, and bond order indices
of the pyrazine molecule and [Ru(NH3)5pyz]2+ complex in the [(NH3)5Ru-pyz-Ru(NH3)5]4+ binuclear complex are analyzed.
St. Petersburg State University. Translated fromZhurnal Strukturnoi Khimii, Vol. 35, No. 4, pp. 12–23, July–August, 1994.
Translated by. O. Kharlamova 相似文献
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Synthesis and Crystal Structure of (C5H5)Mo(CO)3(AuPPh3) and [(C5H5)Mo(CO)2(AuPPh3)4]PF6 CpMo(CO)3(AuPPh3) is obtained by the reaction of Li[CpMo(CO)3] with Ph3PAuCl at ?95°C in CH2Cl2. It crystallizes in the monoclinic space group C2/c with a = 2625.1(7), b = 883.2(1), c = 2328.4(7) pm, β = 116.39(1)° und Z = 8. In the complex the AuPPh3 group is coordinated to the CpMo(CO)3 fragment with a Au? Mo bond of 271,0 pm. The Mo atom thus achieves a square pyramidal coordination with the center of the Cp ring in apical position. CpMo(CO)3(AuPPh3) reacts under uv irradiation with an excess of Ph3PAuN3 to afford the cluster cation [CpMo(CO)2(AuPPh3)4]+. It crystallizes as [CpMo(CO)2(AuPPh3)4]PF6 · 2 CH2Cl2 in the orthorhombic space group P212121 with a = 1553.9(1), b = 1793.8(2), c = 2809.8(7) pm und Z = 4. The five metal atoms form a trigonal bipyramidal cluster skeleton with the Mo atom in equatorial position. The Mo? Au distances range from 275.5 to 280.8 pm, and the Au? Au distances are between 281.2 and 285.6 pm. 相似文献
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