共查询到20条相似文献,搜索用时 15 毫秒
1.
Tatsumi Ochiai Dr. Daniel Franz Dr. Elisabeth Irran Prof. Dr. Shigeyoshi Inoue 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(18):6704-6707
The novel amino(imino)stannylene 1 was prepared by conversion of HNIPr (NIPr=bis(2,6‐diisopropylphenyl)imidazolin‐2‐imino) with one equivalent of Lappert’s tin reagent (Sn[N(SiMe3)2]2). Treatment of 1 with DMAP (4‐dimethylaminopyridine) yields its Lewis acid–base adduct 2 . The reaction of 1 with one equivalent of trimethylsilyl azide results in replacement of the amino group at the tin center by an N3 substituent with concomitant elimination of N(SiMe3)3 to afford dimeric [N3SnNIPr]2 ( 3 ). Remarkably, the reaction of 1 with B(C6F5)3 produces the novel tin(II) monocation 4 +[MeB(C6F5)3]? comprising a four‐membered stannacycle through methyl‐abstraction from the trimethylsilyl group. 相似文献
2.
Anayive P. Rebolledo Geraldo M. de Lima Lillian N. Gambi Nivaldo L. Speziali Daniel F. Maia Carlos B. Pinheiro Jos D. Ardisson Maria Esperanza Corts Heloisa Beraldo 《应用有机金属化学》2003,17(12):945-951
Three tin(IV) complexes of 2‐benzoylpyridine N(4)‐phenylthiosemicarbazone (H2Bz4Ph) were prepared: [Sn(L)Cl3] (1), [BuSn(L)Cl2] (2) and [(Bu)2Sn(L)Cl] (3), in which L stands for the anionic ligand formed upon complexation with deprotonation and release of HCl. The complexes were characterized by a number of spectroscopic techniques. The crystal structures of H2Bz4Ph and complex 3 were determined. The antifungal activity of the ligand and its tin(IV) complexes was tested against Candida albicans. The thiosemicarbazone proved to be more active than the tin(IV) complexes. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
3.
Igor L. Fedushkin Prof. Dr. Valentina A. Chudakova Alexandra A. Skatova Natalie M. Khvoinova Yuri A. Kurskii Tatyana A. Glukhova Georgy K. Fukin Sebastian Dechert Markus Hummert Herbert Schumann Prof. Dr. 《无机化学与普通化学杂志》2004,630(4):501-507
The new rigid bidentate nitrogen ligands 1, 2‐bis[(2, 5‐di‐tert‐butylphenyl)imino]acenaphthene ( 1 ) (dtb‐BIAN) and 1, 2‐bis[(2‐biphenyl)imino]acenaphthene ( 2 ) (bph‐BIAN) have been synthesized by condensation of 1, 2‐acenaphthylenedione with 2, 5‐di‐tert‐butylaniline and 2‐aminobiphenyl, respectively. Reduction of 1 and 2 with magnesium and calcium results in the formation of the monomeric metal complexes [(dtb‐BIAN)Mg(THF)2] ( 3 ), [(bph‐BIAN)Mg(DME)2] ( 4 ), and [(bph‐BIAN)Ca(THF)3] ( 5 ). Compounds 1 — 5 have been characterized by C/H analyses, IR, 1H NMR, and 13C NMR spectra, the structures of 2 , 3 , and 5 have been estimated by single crystal X‐ray diffraction. 相似文献
4.
The Ruthenostannylene Complex [Cp*(IXy)H2Ru‐Sn‐Trip]: Providing Access to Unusual Ru‐Sn Bonded Stanna‐imine,Stannene, and Ketenylstannyl Complexes 下载免费PDF全文
Hsueh‐Ju Liu Micah S. Ziegler Prof. Dr. T. Don Tilley 《Angewandte Chemie (International ed. in English)》2015,54(22):6622-6626
Reactivity studies of the thermally stable ruthenostannylene complex [Cp*(IXy)(H)2Ru? Sn? Trip] ( 1 ; IXy=1,3‐bis(2,6‐dimethylphenyl)imidazol‐2‐ylidene; Cp*=η5‐C5Me5; Trip=2,4,6‐iPr3C6H2) with a variety of organic substrates are described. Complex 1 reacts with benzoin and an α,β‐unsaturated ketone to undergo [1+4] cycloaddition reactions and afford [Cp*(IXy)(H)2RuSn(κ2‐O,O‐OCPhCPhO)Trip] ( 2 ) and [Cp*(IXy)(H)2RuSn(κ2‐O,C‐OCPhCHCHPh)Trip] ( 3 ), respectively. The reaction of 1 with ethyl diazoacetate resulted in a tin‐substituted ketene complex [Cp*(IXy)(H)2RuSn(OC2H5)(CHCO)Trip] ( 4 ), which is most likely a decomposition product from the putative ruthenium‐substituted stannene complex. The isolation of a ruthenium‐substituted stannene [Cp*(IXy)(H)2RuSn(?Flu)Trip] ( 5 ) and stanna‐imine [Cp*(IXy)(H)2RuSn(κ2‐N,O‐NSO2C6H4Me)Trip] ( 6 ) complexes was achieved by treatment of 1 with 9‐diazofluorene and tosyl azide, respectively. 相似文献
5.
Gold(I)‐Catalyzed Addition of Silylacetylenes to Acylsilanes: Synthesis of Indanones by CH Functionalization through a Gold(I) Carbenoid 下载免费PDF全文
Jairo González Dr. Javier Santamaría Prof. Dr. Alfredo Ballesteros 《Angewandte Chemie (International ed. in English)》2015,54(46):13678-13681
A gold(I)‐catalyzed synthesis of indanones from trimethylsilylacetylenes and acylsilanes is presented. The reaction is initiated through a synergistic acylsilane activation–gold acetylide formation and involves consecutive alkyne σ‐gold(I) addition, π‐activation, and 1,2‐migration of a silyl group. Studies performed on the reaction mechanism allowed to establish the nature of the silyl migrating group and invoke the participation of a gold(I) carbenoid intermediate. The reaction is completed by a gold(I) C? H functionalization step. 相似文献
6.
Isolation of a Bis(oxazol‐2‐ylidene)–Phenylborylene Adduct and its Reactivity as a Boron‐Centered Nucleophile 下载免费PDF全文
Dr. Lingbing Kong Dr. Yongxin Li Dr. Rakesh Ganguly Prof. Dr. Dragoslav Vidovic Prof. Dr. Rei Kinjo 《Angewandte Chemie (International ed. in English)》2014,53(35):9280-9283
An isolable phenylborylene species supported by two oxazol‐2‐ylidene ligands was synthesized and structurally characterized. Computational studies revealed the presence of lone‐pair electrons on the boron atom in this molecule; therefore, there are eight electrons around the three‐coordinate boron center. The nucleophilic property was confirmed by the reactions with trifluoromethanesulfonic acid and [(thf)Cr(CO)5], which gave the corresponding conjugate acid and a chromium–borylene complex, respectively. 相似文献
7.
8.
Toshiro Harada Prof. Dr. Daisuke Imaoka Chie Kitano Takahiro Kusukawa Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2010,16(30):9164-9174
Alkylative carbocyclization reactions of ω‐iodoalkynyl tosylates with alkynyllithium compounds to give products with incorporated iodine atoms are described. Slow addition of 2‐(3‐iodoprop‐2‐ynyloxy)ethyl tosylates to 1‐alkynyllithium compounds in tetrahydrofuran at 40 °C followed by additional stirring at this temperature gives (Z)‐3‐(1‐iodoprop‐2‐ynylidene)tetrahydrofurans stereoselectively in good to moderate yields. Under similar conditions at 0 °C, 4‐iodobut‐1‐ynyl tosylates react with 1‐alkynyllithium compounds to give (1‐iodoprop‐2‐ynylidene)cyclopropanes. The carbocyclization reactions are proposed to proceed through a new carbenoid‐chain process involving the exo cyclization of a lithium acetylide intermediate and the vinylic substitution of the resulting TsO,Li‐cycloalkylidenecarbenoids (Ts=tosyl) by 1‐alkynyllithium compounds. 相似文献
9.
Ellery R. Garbelini Manfredo Hrner Mariana Boneberger Behm David J. Evans Fbio S. Nunes 《无机化学与普通化学杂志》2008,634(10):1801-1806
The pyridine‐2‐carbaldehyde semicarbazone ligand (HL) reacts with iron(II) and copper(II) perchlorates in boiling ethanol to yield red‐violet [FeII(HL)2](ClO4)2·H2O ( 1 ) and light‐green crystals [CuII(HL)2](ClO4)2·H2O ( 2 ). The crystals are triclinic with the metal ions in an octahedral environment, coordinated to two nitrogen and one oxygen‐donor atom from HL. Electronic, magnetic and electrochemical properties are presented as well. 相似文献
10.
Dirk Olbert Alexander Kalisch Helmar Görls Irina Malkin Ondik Markus Reiher Prof. Dr. Matthias Westerhausen Prof. Dr. 《无机化学与普通化学杂志》2009,635(3):462-470
Metallation of N‐(diphenylphosphanyl)(2‐pyridylmethyl)amine with n‐butyllithium in toluene yields lithium N‐(diphenylphosphanyl)(2‐pyridylmethyl)amide ( 1 ), which crystallizes as a tetramer. Transamination of N‐(diphenylphosphanyl)(2‐pyridylmethyl)amine with an equimolar amount of Sn[N(SiMe3)2]2 leads to the formation of monomeric bis(trimethylsilyl)amido tin(II) N‐(diphenylphosphanyl)(2‐pyridylmethyl)amide ( 2 ). The addition of another equivalent of N‐(diphenylphosphanyl)(2‐pyridylmethyl)amine gives homoleptic tin(II) bis[N‐(diphenylphosphanyl)(2‐pyridylmethyl)amide] ( 3 ). In these complexes the N‐(diphenylphosphanyl)(2‐pyridylmethyl)amido groups act as bidentate bases through the nitrogen bases. At elevated temperatures HN(SiMe3)2 is liberated from bis(trimethylsilyl)amido tin(II) N‐(diphenylphosphanyl)(2‐pyridylmethyl)amide ( 2 ) yielding mononuclear tin(II) 1,2‐dipyridyl‐1,2‐bis(diphenylphosphanylamido)ethane ( 4 ) through a C–C coupling reaction. The three‐coordinate tin(II) atoms of 2 and 4 adopt trigonal pyramidal coordination spheres. 相似文献
11.
12.
Thorsten Morawitz Michael Bolte Hans‐Wolfram Lerner Matthias Wagner 《无机化学与普通化学杂志》2008,634(9):1570-1574
The synthesis and full characterization of the sterically demanding ditopic lithium bis(pyrazol‐1‐yl)borates Li2[p‐C6H4(B(Ph)pzR2)2] is reported (pzR = 3‐phenylpyrazol‐1‐yl ( 3 Ph), 3‐t‐butylpyrazol‐1‐yl ( 3 tBu)). Compound 3 Ph crystallizes from THF as THF‐adduct 3 Ph(THF)4 which features a straight conformation with a long Li···Li distance of 12.68(1) Å. Compound 3 tBu was found to function as efficient and selective scavenger of chloride ions. In the presence of LiCl it forms anionic complexes [ 3 tBuCl]− with a central Li‐Cl‐Li core (Li···Li = 3.75(1) Å). 相似文献
13.
14.
Robert Wolf Dr. J. Chris Slootweg Dr. Andreas W. Ehlers Dr. František Hartl Dr. Bas de Bruin Dr. Martin Lutz Dr. Anthony L. Spek Prof. Dr. Koop Lammertsma Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(17):3104-3107
P makes it possible : The convenient oxidative synthesis of the 16‐electron organophosphorus iron sandwich complex [Fe(η4‐P2C2tBu2)2] (see structure) suggests that the elusive all‐carbon complex [Fe(η4‐C4H4)2] is a viable synthetic target.
15.
Yi‐Zhi Li Wei‐Wei Liu Yan‐Jie Li Guo‐Jun Pan Hong‐Wen Hu 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(11):o611-o612
An N,N′‐disubstituted dithiooxamide derivative reacts with 1,2‐dibromoethane to produce the title compound, C18H18N2S2, a heterocycle with a double Schiff base. In the crystal structure, the molecule of the title compound lies on a twofold axis. Weak C—H⋯π interactions are the principal intermolecular forces, mediating the formation of layers parallel to the ab plane. Each molecule participates as donor and acceptor in two such contacts. 相似文献
16.
17.
Yemei Wang Shigeki Mori Hiroyuki Furuta Soji Shimizu 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(32):11091-11095
Bis(1,3‐dithiol‐2‐ylidene)‐substituted subtriazachlorin was formed because of an unusual reaction of a 1,3‐dithiole‐2‐one‐fused subphthalocyanine in a triethylphosphite‐mediated tetrathiafulvalene synthesis. In this novel molecule, the bis(1,3‐dithiol‐2‐ylidene)ethane moiety and subtriazachlorin structure are fused, resulting in an electron‐donating ability and broad absorption in the near‐infrared region. 相似文献
18.
(E)‐ and (Z)‐1,2‐bis(trifluoromethyl)ethene‐1,2‐dicarbonitrile (BTE; (=E)‐ and (Z)‐1,2‐bis(trifluoromethyl)but‐2‐enedinitrile) were reacted with an excess of methyl vinyl ether, used as solvent, and furnished 1 : 2 adducts 6 (54%) and cyclobutanes 3 as 1 : 1 adducts (41%). The four diastereoisomeric bis‐adducts 6 (different ratios from (E)‐ and (Z)‐BTE) are derivatives of 1‐azabicyclo[4.2.0]oct‐5‐ene; X‐ray analyses and 19F‐NMR spectra revealed their structures. Since the cyclobutanes 3 are resistant to vinyl ether, the pathways leading to mono‐ and bis‐adducts must compete on the level of the intermediate l,4‐zwitterions 1 and 2 . The latter either cyclize to the cyclobutanes 3 or to six‐membered cyclic ketene imines 8 which accept a second molecule of vinyl ether to yield the bis‐adducts 6 . The occurrence of the highly strained ketene imines 8 gains credibility by comparison to stable seven‐membered cyclic ketene imines recently reported. 相似文献
19.
20.
M. Paula C. Campello Dr. Sara Lacerda Dr. Isabel C. Santos Dr. Giovannia A. Pereira Dr. Carlos F. G. C. Geraldes Prof. Dr. Jan Kotek Dr. Petr Hermann Dr. Jakub Vaněk Přemysl Lubal Vojtěch Kubíček Dr. Éva Tóth Isabel Santos Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2010,16(28):8446-8465
Complexes of 4,10‐bis(phosphonomethyl)‐1,4,7,10‐tetraazacyclododecane‐1,7‐diacetic acid (trans‐H6do2a2p, H6 L ) with transition metal and lanthanide(III) ions were investigated. The stability constant values of the divalent and trivalent metal‐ion complexes are between the corresponding values of H4dota and H8dotp complexes, as a consequence of the ligand basicity. The solid‐state structures of the ligand and of nine lanthanide(III) complexes were determined by X‐ray diffraction. All the complexes are present as twisted‐square‐antiprismatic isomers and their structures can be divided into two series. The first one involves nona‐coordinated complexes of the large lanthanide(III) ions (Ce, Nd, Sm) with a coordinated water molecule. In the series of Sm, Eu, Tb, Dy, Er, Yb, the complexes are octa‐coordinated only by the ligand donor atoms and their coordination cages are more irregular. The formation kinetics and the acid‐assisted dissociation of several LnIII–H6 L complexes were investigated at different temperatures and compared with analogous data for complexes of other dota‐like ligands. The [Ce( L )(H2O)]3? complex is the most kinetically inert among complexes of the investigated lanthanide(III) ions (Ce, Eu, Gd, Yb). Among mixed phosphonate–acetate dota analogues, kinetic inertness of the cerium(III) complexes is increased with a higher number of phosphonate arms in the ligand, whereas the opposite is true for europium(III) complexes. According to the 1H NMR spectroscopic pseudo‐contact shifts for the Ce–Eu and Tb–Yb series, the solution structures of the complexes reflect the structures of the [Ce(H L )(H2O)]2? and [Yb(H L )]2? anions, respectively, found in the solid state. However, these solution NMR spectroscopic studies showed that there is no unambiguous relation between 31P/1H lanthanide‐induced shift (LIS) values and coordination of water in the complexes; the values rather express a relative position of the central ions between the N4 and O4 planes. 相似文献