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Liu R, Yang S, Ding Y, Xia D. Study on thermodynamic property of pyrrolylaldiminate dialkyl-aluminum (Methyl- and Ethyl- substituted) complexes. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2021.122192] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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2
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Koshino K, Kinjo R. A Highly Strained Al-Al σ-Bond in Dianionic Aluminum Analog of Oxirane for Molecule Activation. J Am Chem Soc 2021; 143:18172-18180. [PMID: 34697939 DOI: 10.1021/jacs.1c07389] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Since aluminum is the most electropositive element among the p-block elements, the construction of molecules bearing a dianionic Al-Al σ-bond is inherently highly challenging. Herein, we report the first synthesis of a dianionic dialane(6) 2 based on the Al2O three-membered ring scaffold, namely, an aluminum analog of oxirane. The structure of 2 has been unambiguously ascertained by spectroscopic analysis as well as X-ray crystallography, and computational studies revealed that 2 bears a highly strained Al-Al σ-bond. 2 readily reacts with the unsaturated substrates such as isocyanide, ethylene, and ketone, concomitant with the cleavage of the Al-Al σ-bond under mild conditions, leading to the four- and five-membered heterocycles 3-5. Furthermore, the reaction of 2 with two molecules of benzonitrile (PhCN) furnishes a seven-membered heterocycle 6, resulting from the C-C coupling reaction of PhCN. We further delineate that 2 selectively activates an arene ring C-C bond of biphenylene, rendering a di-Al-substituted benzo[8]annulene derivative 7. Preliminary computational studies propose that the stepwise reaction mechanism involves the Al-Al σ-bond cleavage, dearomative Al-C bond formation, subsequent sigmatropic [1,3]shifts, and a pericyclic reaction.
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Affiliation(s)
- Kota Koshino
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
| | - Rei Kinjo
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
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3
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Liu R, Yang S, Ding Y. Study on the Structure, Thermodynamic property, and Fluorescence of Pyridin‐2‐ylmethyl‐tert‐butylamine Dimethyl aluminum complex. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202000478] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ruiyuan Liu
- The Key Laboratory of synthetic and biological colloids, Ministry of Education, School of Chemical and Material Engineering Jiangnan University Wuxi 214122 Jiangsu Province China
| | - Shuyan Yang
- The Key Laboratory of synthetic and biological colloids, Ministry of Education, School of Chemical and Material Engineering Jiangnan University Wuxi 214122 Jiangsu Province China
| | - Yuqiang Ding
- The Key Laboratory of synthetic and biological colloids, Ministry of Education, School of Chemical and Material Engineering Jiangnan University Wuxi 214122 Jiangsu Province China
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4
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Guo Z, Xu Y, Wu X, Wei X, Xi C. Potassium complexes containing bidentate pyrrole ligands: synthesis, structures, and catalytic activity for the cyclotrimerization of isocyanates. Dalton Trans 2019; 48:8116-8121. [PMID: 31032504 DOI: 10.1039/c9dt01246j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Bidentate pyrrolyl ligands, 2-(t-butyliminomethyl)pyrrole and 2-(t-butylaminomethyl)pyrrole, reacted with KH to give complexes [C4H3N(2-CH[double bond, length as m-dash]NtBu)K(THF)]n (1) and [C4H3N(2-CH2NHtBu)K]n (2), respectively. Each has been characterized by C, H and N microanalysis, NMR spectroscopy, and single crystal X-ray structural analysis. The X-ray structure of complex 1 (n≥ 1) demonstrated that it exists as a 1D zig-zag coordination polymer in the solid state. Conversely, the structure of complex 2 (n≥ 1) showed that it is a 2D supramolecular network. They proved to be an effective class of catalysts for cyclotrimerization of isocyanate in excellent yield under mild conditions.
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Affiliation(s)
- Zhiqiang Guo
- Scientific Instrument Center, Shanxi University, Taiyuan, 030006, P.R. China.
| | - Yuan Xu
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, P.R. China
| | - Xiaoqin Wu
- Scientific Instrument Center, Shanxi University, Taiyuan, 030006, P.R. China.
| | - Xuehong Wei
- Scientific Instrument Center, Shanxi University, Taiyuan, 030006, P.R. China.
| | - Chanjuan Xi
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China.
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5
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Zinc and aluminum complexes of chiral ligands: Synthesis, characterization and application to rac-lactide polymerization. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.12.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Lin TH, Cai YR, Chang W, Hu CH, Lee TY, Datta A, Hsiao HC, Lin CH, Huang JH. Synthesis and characterization of multidentate ethylene bridged pyrrole- and ketoamine-morpholine aluminum compounds. Structure, theoretical calculation and catalytic study. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.10.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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7
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Wei Y, Wang S, Zhou S, Feng Z, Guo L, Zhu X, Mu X, Yao F. Aluminum Alkyl Complexes Supported by Bidentate N,N Ligands: Synthesis, Structure, and Catalytic Activity for Guanylation of Amines. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00101] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yun Wei
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Shaowu Wang
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, People’s Republic of China
| | - Shuangliu Zhou
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Zhijun Feng
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Liping Guo
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Xiancui Zhu
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Xiaolong Mu
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Fangshi Yao
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
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8
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Synthesis and characterization of tri-dentate pyrrole-morpholine ligands and their corresponding aluminum, magnesium, and zinc compounds. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.12.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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9
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Hsu SY, Hu CH, Tu CY, Lin CH, Chen RY, Datta A, Huang JH. Aluminum Compounds Containing Pyrrole-Imine Ligand Systems - Synthesis, Characterization, Structure Elucidation, Ring-Opening Polymerization, and Catalytic Meerwein-Ponndorf-Verley Reaction. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201400082] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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10
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Liu PH, Chuang FJ, Tu CY, Hu CH, Lin TW, Wang YT, Lin CH, Datta A, Huang JH. Aluminum complexes incorporating symmetrical and asymmetrical tridentate pincer type pyrrolyl ligands: synthesis, characterization and reactivity study. Dalton Trans 2013; 42:13754-64. [PMID: 23907274 DOI: 10.1039/c3dt51133b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of aluminum complexes incorporating substituted symmetrical and asymmetrical tridentate pyrrolyl ligands are synthesized conveniently and the treatment of the derivatives with small organic molecules are analyzed. The reaction of lithiated [C4H2NH(2-CH2NH(t)Bu)(5-CH2NR1R2)], where for 1, R1 = R2 = Me; 2, R1 = H, R2 = (t)Bu, with AlCl3 in diethyl ether affords Al[C4H2N(2-CH2NH(t)Bu)(5-CH2NMe2)]Cl2 (3) and Al[C4H2N(2,5-CH2NH(t)Bu)2]Cl2 (4), respectively, in high yields. Furthermore, subjecting 3 and 4 to reaction with one equiv. of LiNMePh in diethyl ether generates Al[C4H2N(2-CH2NH(t)Bu)(5-CH2NMe2)][NMePh]Cl (5) and Al[C4H2N(2,5-CH2NH(t)Bu)2][NMePh]Cl (6), respectively, while eliminating one equiv. of LiCl. The reaction between compound 4 with two equiv. of LiO-Ph-4-Me in diethyl ether yields the aluminum di-phenoxide compound Al[C4H2N(2,5-CH2NH(t)Bu)2](O-Ph-4-Me)2 (7) whereas the combination of 3 and two equiv. of LiNH(t)Bu, produces Al[C4H2N(2-CH2N(t)Bu)(5-CH2NMe2)](NH(t)Bu)(NH2(t)Bu) (8). Additionally, the mixing of 1 and one equiv. of AlMe3 renders Al[C4H2N(2-CH2NH(t)Bu)(5-CH2NMe2)]Me2 (9). Adding one more equiv. of AlMe3 with 9 affords {Al[C4H2N(2-CH2NH(t)Bu)(5-CH2NMe2)AlMe3]Me2} (10), which can also be obtained by treating 1 with two equiv. of AlMe3 directly. The treatment of 9 with one equiv. of 2,6-dimethylphenol in diethyl ether gives the aluminum alkoxide derivative, Al[C4H2N(2-CH2NH(t)Bu)(5-CH2NMe2)](O-C6H3-2,6-Me2)Me (11). Furthermore, the reaction between 9 and one equiv. of 1-ethyl-1-phenyl ketene, initiates the aluminum dimethyl complex Al{C4H2N[2-CH2CEtPh-C(=O)-NH(t)Bu](5-CH2NMe2)}Me2 (12) with a C-N bond breakage and a C-C bond formation. All the Al-derivatives are characterized by (1)H and (13)C NMR spectroscopy and the molecular structures are determined by single crystal X-ray diffractometry in solid state.
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Affiliation(s)
- Pei-Hsin Liu
- Department of Chemistry, National Changhua University of Education, Changhua 50058, Taiwan
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11
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Hengesbach F, Jin X, Hepp A, Wibbeling B, Würthwein EU, Uhl W. Activation of Isocyanates and Carbon Dioxide by a Monomeric Aluminium Hydrazide as an Active Lewis Pair. Chemistry 2013; 19:13901-9. [PMID: 24038438 DOI: 10.1002/chem.201302179] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Indexed: 11/06/2022]
Affiliation(s)
- Frank Hengesbach
- Institut für Anorganische und Analytische Chemie der Universität Münster, Corrensstrasse 30, 48149 Münster (Germany)
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12
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Guo Z, Liu Q, Wei X, Zhang Y, Tong H, Chao J, Guo J, Liu D. 2-Aminopyrrolyl Dilithium Compounds: Synthesis, Structural Diversity, and Catalytic Activity for Amidation of Aldehydes with Amines. Organometallics 2013. [DOI: 10.1021/om4006609] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Zhiqiang Guo
- Institute
of Applied Chemistry, Shanxi University, Taiyuan, 030006, People’s Republic of China
| | - Qiao Liu
- School of Chemistry and Chemical
Engineering, Shanxi University, Taiyuan,
030006, People’s Republic of China
| | - Xuehong Wei
- Institute
of Applied Chemistry, Shanxi University, Taiyuan, 030006, People’s Republic of China
- School of Chemistry and Chemical
Engineering, Shanxi University, Taiyuan,
030006, People’s Republic of China
| | - Yongbin Zhang
- Institute
of Applied Chemistry, Shanxi University, Taiyuan, 030006, People’s Republic of China
| | - Hongbo Tong
- Institute
of Applied Chemistry, Shanxi University, Taiyuan, 030006, People’s Republic of China
| | - Jianbin Chao
- Institute
of Applied Chemistry, Shanxi University, Taiyuan, 030006, People’s Republic of China
| | - Jianping Guo
- Solid Wastes Resource Utilization and Energy Saving Building Materials State Key Laboratory, Beijing, 100041, People’s Republic of China
| | - Diansheng Liu
- Institute
of Applied Chemistry, Shanxi University, Taiyuan, 030006, People’s Republic of China
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13
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Bidentate pyrrolyl lithium complexes: Synthesis, crystal structure and catalytic activity for the cyclotrimerization of isocyanates. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2013.04.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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14
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Roters S, Appelt C, Westenberg H, Hepp A, Slootweg JC, Lammertsma K, Uhl W. Dimeric aluminum–phosphorus compounds as masked frustrated Lewis pairs for small molecule activation. Dalton Trans 2012; 41:9033-45. [DOI: 10.1039/c2dt30080j] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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15
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Lichtenberg C, Spaniol TP, Okuda J. Reactivity of Tris(allyl)aluminum toward Pyridine: Coordination versus Carbometalation. Organometallics 2011. [DOI: 10.1021/om200492f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Crispin Lichtenberg
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany
| | - Thomas P. Spaniol
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany
| | - Jun Okuda
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany
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16
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Schmidt S, Schäper R, Schulz S, Bläser D, Wölper C. Insertion Reactions of Heterocumulenes into Zn−C Bonds: Synthesis and Structural Characterization of Multinuclear Zinc Amidate Complexes. Organometallics 2011. [DOI: 10.1021/om101107e] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sarah Schmidt
- Institute of Inorganic Chemistry, University of Duisburg-Essen, 45117 Essen, Germany
| | - Raphaela Schäper
- Institute of Inorganic Chemistry, University of Duisburg-Essen, 45117 Essen, Germany
| | - Stephan Schulz
- Institute of Inorganic Chemistry, University of Duisburg-Essen, 45117 Essen, Germany
| | - Dieter Bläser
- Institute of Inorganic Chemistry, University of Duisburg-Essen, 45117 Essen, Germany
| | - Christoph Wölper
- Institute of Inorganic Chemistry, University of Duisburg-Essen, 45117 Essen, Germany
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17
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Sutar AK, Maharana T, Dutta S, Chen CT, Lin CC. Ring-opening polymerization by lithium catalysts: an overview. Chem Soc Rev 2010; 39:1724-46. [PMID: 20411192 DOI: 10.1039/b912806a] [Citation(s) in RCA: 185] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This critical review summarizes recent developments in the preparation and application of lithium catalysts/initiators such as, alkyl lithium, alkoxy lithium and bimetallic lithium compounds for ring-opening polymerization (ROP). The ROP of cyclic esters, cyclic carbonates, cyclo-silazanes, cyclo-silanes, cyclo-siloxanes, cyclo-carboxylate, cyclic phosphirene and quinodimethanes are covered in this review. The present paper emphasizes the polymerization kinetics and the control exhibited by the different types of lithium initiators/catalysts. For the cases where useful properties, such as high molecular weight, narrow PDI, or stereocontrol, have been observed, a more detailed examination of the mechanistic studies of the catalysts/initiators are provided. Furthermore, this review also focuses on the synthesis of block copolymers and graft copolymers by ROP principle. The topics covered in this review regarding lithium compounds toward ROP will be of interest to inorganic, organic and organometallic chemists, material, polymer and catalytic scientists due to its unique mode of activation as compared to transition and inner transition-metals. In addition, use of these compounds in catalysis is steadily growing, because of the complementary reactivity toward ROP as compared to other metals. Finally, some aspects and opportunities which may be of interest in the future are suggested (143 references).
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Affiliation(s)
- Alekha Kumar Sutar
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, Republic of China
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18
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De S, Pierce GA, Vidovic D, Kays DL, Coombs ND, Jemmis ED, Aldridge S. Reactivity of Cationic Terminal Borylene Complexes: Novel Mechanisms for Insertion and Metathesis Chemistry Involving Strongly Lewis Acidic Ligand Systems. Organometallics 2009. [DOI: 10.1021/om801214f] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Susmita De
- Inorganic Chemistry, University of Oxford, South Parks Road, Oxford, U.K. OX1 3QR
| | - Glesni A. Pierce
- Inorganic Chemistry, University of Oxford, South Parks Road, Oxford, U.K. OX1 3QR
| | - Dragoslav Vidovic
- Inorganic Chemistry, University of Oxford, South Parks Road, Oxford, U.K. OX1 3QR
| | - Deborah L. Kays
- Inorganic Chemistry, University of Oxford, South Parks Road, Oxford, U.K. OX1 3QR
| | - Natalie D. Coombs
- Inorganic Chemistry, University of Oxford, South Parks Road, Oxford, U.K. OX1 3QR
| | | | - Simon Aldridge
- Inorganic Chemistry, University of Oxford, South Parks Road, Oxford, U.K. OX1 3QR
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19
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Chen IC, Ho SM, Chen YC, Lin CY, Hu CH, Tu CY, Datta A, Huang JH, Lin CH. Deprotonation and reductive addition reactions of hypervalent aluminium dihydride compounds containing substituted pyrrolyl ligands with phenols, ketones, and aldehydes. Dalton Trans 2009:8631-43. [PMID: 19809740 DOI: 10.1039/b908164j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- I-Chun Chen
- Department of Chemistry, National Changhua University of Education, Changhua, 50058, Taiwan
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20
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Lin CY, Tsai CF, Chen HJ, Hung CH, Yu RC, Kuo PC, Lee HM, Huang JH. Insertion, Reduction, and Carbon–Carbon Coupling Induced by Monomeric Aluminum Hydride Compounds Bearing Substituted Pyrrolyl Ligands. Chemistry 2006; 12:3067-73. [PMID: 16429470 DOI: 10.1002/chem.200500989] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A monomeric aluminum hydride complex bearing substituted pyrrolyl ligands, AlH[C(4)H(3)N(CH(2)NMe(2))-2](2) (1), was synthesized and structurally characterized. To further confirm the presence of Al--H bonds, the compound AlD[C(4)H(3)N(CH(2)NMe(2))-2](2) ([D]1) was synthesized by reacting LiAlD(4) with [C(4)H(4)N(CH(2)NMe(2))-2]. Compound 1 and [D]1 react with phenyl isothiocyanate yielding Al[C(4)H(3)N(CH(2)NMe(2))-2](2)[eta(3)-SCHNPh] (2) and Al[C(4)H(3)N(CH(2)NMe(2))-2](2)[eta(3)-SCDNPh] ([D]2) by insertion. The reactions of 1 with 9-fluorenone and benzophenone generated the unusual aluminum alkoxide complexes 3 and 4, respectively, through intramolecular proton abstraction and C-C coupling. A mechanistic study shows that 9-fluorenone coordinates to [D]1 and releases one equivalent of HD followed by C-C coupling and hydride transfer to yield the final product. Reduction of benzil with 1 affords aluminum enediolate complex 5 in moderate yield. Mechanistic studies also showed that the benzil was inserted into the aluminum hydride bond of [D]1 through hydroalumination followed by proton transfer to generate the final product [D]5. All new complexes have been characterized by (1)H and (13)C NMR spectroscopy and X-ray crystallography.
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Affiliation(s)
- Che-Yu Lin
- Department of Chemistry, National Changhua University of Education, Changhua, Taiwan
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21
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Synthesis and characterization of lithium and yttrium complexes containing tridentate pyrrolyl ligands. Single-crystal X-ray structures of {Li[C4H2N(CH2NMe2)2-2,5]}2 (1) and {[C4H2N(CH2NMe2)2-2,5]YCl2(μ-Cl)·Li(OEt2)2}2 (2) and ring-opening polymerization of ε-caprolactone. J Organomet Chem 2005. [DOI: 10.1016/j.jorganchem.2005.06.024] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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22
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Hsieh KC, Lee WY, Lai CL, Hu CH, Lee HM, Huang JH, Peng SM, Lee GH. Insertion reactions of phenyl isocyanate into hafnium nitrogen bonds: synthesis and reactivity of hafnium complexes bearing substituted pyrrolyl ligands. J Organomet Chem 2004. [DOI: 10.1016/j.jorganchem.2004.07.046] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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