共查询到20条相似文献,搜索用时 15 毫秒
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Whereas reaction of [PhCH2NMe3]2|Te6Fe8(CO)24] (1) in refluxing CH2CI2 forms Fe2(CO)6(μ0-) TeCH2Te), treatment of 1 with Ph2SnCl 2 or Mel gave the oxidation product Te2Fe3(CO)9. Oxidation of 1 with [Cu(CH3CN)4]BF4 afforded Te2Fe3(CO)9 in good yield. Cluster 1 was converted to [PhCH2NMe3][Te4Fe5(CO)14] (2) in MeOH/CH2Cl2 solution. Cluster 2 was structurally characterized by single-crystal X-ray diffraction and spectral methods. Complex 2 is composed of two Te2Fe2(CO)6 fragments linked by one Fe(CO)2 group. 2 crystallizes in the orthorhombic space group Pbcn with a = 13.351 (4) Å, b = 13.417 (4) Å, c = 26.077 (3) Å, V = 4671 (2) Å 3, Z = 4. 相似文献
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Solvothermal reaction of [MnCl2(amine)] (amine = terpy and tren) with elemental As and Se at a 1:1:2 molar ratio in H2O/tren (10:1) affords the dimanganese(II) complexes [{Mn(terpy)}2(μ‐As2Se4)] ( 1 ) and [{Mn(tren)}2(μ‐As2Se5)] ( 2 ) respectively. The tetradentate [As2Se4]4? bridging ligands in 1 contain a central As–As bond and exhibit approximately C2h symmetry. Pairs of gauche sited Se atoms participate in five‐membered As2Se2Mn chelate rings. In contrast, two AsSe3 pyramids share a common corner in the [As2Se5]4? ligands of 2 and each coordinates an [Mn(tren)]2+ fragment through a single terminal Se atom. Such dinuclear complexes are linked into tetranuclear moieties through weak Se···Mn interactions of length 3.026(3) Å involving one of these terminal Se atoms. At a 1:3:6 molar ratio, solvothermal reaction of [MnCl2(tren)] with As and Se leads to formation of a second dinuclear complex [{Mn(tren)}2(μ‐As2Se6)2] ( 3 ), which contains two bridging bidentate [As2Se6]2? ligands. These are cyclic with an As2Se4 ring and can be regarded as being derived from [As2Se5]4? anions by formation of two Se‐Se bonds to an additional Se atom. 相似文献
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Jonas Bresien Dr. Stefan Ellinger Dr. Jörg Harloff Prof. Dr. Axel Schulz Katharina Sievert Alrik Stoffers Dr. Christoph Täschler Dr. Alexander Villinger Dr. Cornelia Zur Täschler 《Angewandte Chemie (International ed. in English)》2015,54(15):4474-4477
The systematic study of the reaction of M[PF6] salts and Me3SiCN led to a synthetic method for the synthesis and isolation of a series of salts containing the unprecedented [PF2(CN)4]? ion in good yields. The reaction temperature, pressure, and stoichiometry were optimized. The crystal structures of M[PF2(CN)4] (M=[nBu4N]+, Ag+, K+, Li+, H5O2+) were determined. X‐ray crystallography showed the exclusive formation of the cis isomer in accord with 31P and 19F solution NMR spectroscopy data. Starting with the K[PF2(CN)4] the room temperature ionic liquid EMIm[PF2(CN)4] was prepared exhibiting a rather low viscosity. 相似文献
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Lauren N. Grant Prof. Balazs Pinter Brian C. Manor Prof. Dr. Hansjörg Grützmacher Prof. Dr. Daniel J. Mindiola 《Angewandte Chemie (International ed. in English)》2018,57(4):1049-1052
The first example of the OCPPCO ligand, diisophosphaethynolate, is reported via reductive coupling of a Sc?OCP precursor. Upon reduction with KC8, isolation of the dinuclear complex, namely [K(OEt2)]2[(nacnac)Sc(OAr)]2(OCPPCO), is observed, leading to a unique motif [OCPPCO]4?, stabilized by two scandium centers. Detailed NMR spectra of all complexes as well as IR and single crystal X‐ray studies were obtained to fully elucidate the nature of these complexes in solution as well as in the solid state. Theory is combined to probe the electronic structure and orbitals responsible for the bonding interactions in the Sc?OCPPCO?Sc skeleton but also to compare to the linear mode observed in the precursor. 相似文献
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Synthesis and Crystal Structure of Rb8[P4N6(NH)4](NH2)2 with the Adamantane-like Anion [P4N6(NH)4]6? RbNH2 reacts with P3N5 (molar ratio 6:1) at 400°C within 5 d to colourless Rb8[P4N6(NH)4](NH2)2. Suitable crystals for a X-ray structure determination were obtained: The compound contains adamantane-like molecular anions [P4N6(NH)4]6?. Their centres of gravity are arranged in a distorted hexagonal primitive array. All trigonal prisms of this array contain one amide ion. Rubidium ions connect the anions irregularly. 相似文献
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Tetra-azidodiamminecobaltates(III): cis-[Co(N3)4(NH3)2]? and [Co(N3)4en]? The preparation and the properties of complexes containing the anions cis-[Co(N3)4(NH3)2]? and [Co(N3)4en]? are described. The compounds [Co(NH3)6][Co(N3)4(NH3)2 · H2O], [Co(N3)2(NH3)4][Co(N3)4(NH3)2], [As(C6H5)4][Co(N3)4en], cis- and trans-[Co(N3)2en2][Co(N3)4en] have been isolated. 相似文献
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Chao Liu Nikolay V. Tkachenko Ivan A. Popov Nikita Fedik Xue Min Cong‐Qiao Xu Jun Li John E. McGrady Alexander I. Boldyrev Zhong‐Ming Sun 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(25):8455-8459
We report the characterization of the compound [K([2.2.2]crypt)]4[In8Sb13], which proves to contain a 1:1 mixture of [Sb@In8Sb12]3? and [Sb@In8Sb12]5?. The tri‐anion displays perfect Th symmetry, the first completely inorganic molecule to do so, and contains eight equivalent In3+ centers in a cube. The gas‐phase potential energy surface of the penta‐anion has eight equivalent minima where the extra pair of electrons is localized on one In+ center, and these minima are linked by low‐lying transition states where the electron pair is delocalized over two adjacent centers. The best fit to the electron density is obtained from a model where the structure of the 5? cluster lies close to the gas‐phase transition state. 相似文献