1
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Yu YD, Price JS, Romero PE, Emslie DJH. Homoleptic 1-norbornyl complexes of group 4 and manganese: synthesis, structures, volatility, and thermal stability. CAN J CHEM 2022. [DOI: 10.1139/cjc-2022-0103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Detailed syntheses are reported for the previously reported homoleptic 1-norbornyl complexes [M(norb)4] {M = Ti (1), Zr (3), Hf (4), and Mn (5)}. These compounds were characterized by combustion elemental analysis, NMR spectroscopy, single crystal X-ray diffraction (for 1 and 3), and SQUID magnetometry (for 5). The reaction by-product [{(norb)3Ti}2(μ-O)] (2) was also spectroscopically and structurally characterized. To assess the potential viability of 1 and 3–5 as precursors for thin film deposition by CVD or ALD, their volatility and thermal stability were evaluated by sublimation, thermogravimetric analysis, and in the case of 4, bulk thermolysis.
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Affiliation(s)
- Ya-Dong Yu
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4M1, Canada
| | - Jeffrey S. Price
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4M1, Canada
| | - Patricio E. Romero
- Intel Corporation, Components Research, 2511 NW 229th Ave., Hillsboro, OR 97124, USA
| | - David J. H. Emslie
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4M1, Canada
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2
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Liu S, Zhang Z, Abelson JR, Girolami GS. Platinum ω-Alkenyl Compounds as Chemical Vapor Deposition Precursors. Mechanistic Studies of the Thermolysis of Pt[CH2CMe2CH2CH═CH2]2 in Solution and the Origin of Rapid Nucleation. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00542] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sumeng Liu
- School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Zhejun Zhang
- Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, 1304 West Green Street, Urbana, Illinois 61801, United States
| | - John R. Abelson
- Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, 1304 West Green Street, Urbana, Illinois 61801, United States
| | - Gregory S. Girolami
- School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
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3
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Al Maksoud W, Gevers LE, Vittenet J, Ould-Chikh S, Telalovic S, Bhatte K, Abou-Hamad E, Anjum DH, Hedhili MN, Vishwanath V, Alhazmi A, Almusaiteer K, Basset JM. A strategy to convert propane to aromatics (BTX) using TiNp 4 grafted at the periphery of ZSM-5 by surface organometallic chemistry. Dalton Trans 2019; 48:6611-6620. [PMID: 31017165 DOI: 10.1039/c9dt00905a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The direct conversion of propane into aromatics (BTX) using modified ZSM-5 was achieved with a strategy of "catalysis by design". In contrast to the classical mode of action of classical aromatization catalysts which are purely based on acidity, we have designed the catalyst associating two functions: One function (Ti-hydride) was selected to activate the C-H bond of propane by σ-bond metathesis to further obtain olefin by β-H elimination and the other function (Brønsted acid) being responsible for the oligomerization, cyclization, and aromatization. This bifunctional catalyst was obtained by selectively grafting a bulky organometallic complex of tetrakis(neopentyl)titanium (TiNp4) at the external surface (external silanol ([triple bond, length as m-dash]Si-OH) group) of [H-ZSM-5300] to obtain [Ti/ZSM-5] catalyst 1. This metal was chosen to activate the C-H bond of paraffin at the periphery of the ZSM-5 while maintaining the Brønsted acid properties of the internal [H-ZSM-5] for oligomerization, cyclization, and aromatization. Catalyst 2 [Ti-H/ZSM-5] was obtained after treatment under H2 at 550 °C of freshly prepared catalyst 1 ([Ti/ZSM-5]) and catalyst 1 was thoroughly characterized by ICP analysis, DRIFT, XRD, N2-physisorption, multinuclear solid-state NMR, XPS and HR-TEM analysis including STEM imaging. The conversion of propane to aromatics was studied in a dynamic flow reactor. With the pristine [H-ZSM-5300] catalyst, the conversion of propane is very low. However, with [Ti-H/ZSM-5] catalyst 2 under the same reaction conditions, the conversion of propane remains significant during 60 h of the reaction (ca. 22%). Furthermore, the [Ti-H/ZSM-5] catalyst shows a good and stable selectivity (55%) for aromatics (BTX) of time on stream. With 2, it was found that the Ti remains at the periphery of the [H-ZSM-5] even after reaction time.
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Affiliation(s)
- Walid Al Maksoud
- King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center (KCC), Thuwal, 23955-6900, Saudi Arabia.
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4
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Qi Y, Meng C, Xu X, Deng B, Han N, Liu M, Hong M, Ning Y, Liu K, Zhao J, Fu Q, Li Y, Zhang Y, Liu Z. Unique Transformation from Graphene to Carbide on Re(0001) Induced by Strong Carbon–Metal Interaction. J Am Chem Soc 2017; 139:17574-17581. [DOI: 10.1021/jacs.7b09755] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yue Qi
- Center
for Nanochemistry (CNC), Academy for Advanced Interdisciplinary Studies,
Beijing National Laboratory for Molecular Sciences, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
| | - Caixia Meng
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Xiaozhi Xu
- State
Key Laboratory for Mesoscopic Physics, School of Physics, Academy
for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, People’s Republic of China
| | - Bing Deng
- Center
for Nanochemistry (CNC), Academy for Advanced Interdisciplinary Studies,
Beijing National Laboratory for Molecular Sciences, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
| | - Nannan Han
- Key
Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Ministry of Education, Dalian 116024, People’ s Republic of China
| | - Mengxi Liu
- CAS
Key Laboratory of Standardization and Measurement for Nanotechnology,
CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, People’s Republic of China
| | - Min Hong
- Department
of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, People’s Republic of China
| | - Yanxiao Ning
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Kaihui Liu
- State
Key Laboratory for Mesoscopic Physics, School of Physics, Academy
for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, People’s Republic of China
| | - Jijun Zhao
- Key
Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Ministry of Education, Dalian 116024, People’ s Republic of China
| | - Qiang Fu
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Yuanchang Li
- Advanced
Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
| | - Yanfeng Zhang
- Center
for Nanochemistry (CNC), Academy for Advanced Interdisciplinary Studies,
Beijing National Laboratory for Molecular Sciences, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
- Department
of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, People’s Republic of China
- Beijing Graphene Institute (BGI), Beijing 100095, People’s Republic of China
| | - Zhongfan Liu
- Center
for Nanochemistry (CNC), Academy for Advanced Interdisciplinary Studies,
Beijing National Laboratory for Molecular Sciences, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
- Beijing Graphene Institute (BGI), Beijing 100095, People’s Republic of China
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5
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Hohloch S, Kriegel BM, Bergman RG, Arnold J. Group 5 chemistry supported by β-diketiminate ligands. Dalton Trans 2016; 45:15725-15745. [DOI: 10.1039/c6dt01770c] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
β-Diketiminate (BDI) ligands are widely used supporting ligands in modern organometallic chemistry and are capable of stabilizing various metal complexes in multiple oxidation states and coordination environments.
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Affiliation(s)
| | | | | | - John Arnold
- Department of Chemistry
- University of California
- Berkeley
- USA
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6
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Won YS. Computational study on the decomposition of tetraneopentyl zirconium for the chemical vapor deposition of zirconium carbide. KOREAN J CHEM ENG 2012. [DOI: 10.1007/s11814-012-0050-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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7
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Zou G, Wang H, Mara N, Luo H, Li N, Di Z, Bauer E, Wang Y, McCleskey T, Burrell A, Zhang X, Nastasi M, Jia Q. Chemical Solution Deposition of Epitaxial Carbide Films. J Am Chem Soc 2010; 132:2516-7. [DOI: 10.1021/ja9102315] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guifu Zou
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Texas A&M University, College Station, Texas 77843, and New Mexico State University, Las Cruces, New Mexico 88003
| | - Haiyan Wang
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Texas A&M University, College Station, Texas 77843, and New Mexico State University, Las Cruces, New Mexico 88003
| | - Nathan Mara
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Texas A&M University, College Station, Texas 77843, and New Mexico State University, Las Cruces, New Mexico 88003
| | - Hongmei Luo
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Texas A&M University, College Station, Texas 77843, and New Mexico State University, Las Cruces, New Mexico 88003
| | - Nan Li
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Texas A&M University, College Station, Texas 77843, and New Mexico State University, Las Cruces, New Mexico 88003
| | - Zengfeng Di
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Texas A&M University, College Station, Texas 77843, and New Mexico State University, Las Cruces, New Mexico 88003
| | - Eve Bauer
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Texas A&M University, College Station, Texas 77843, and New Mexico State University, Las Cruces, New Mexico 88003
| | - Yongqiang Wang
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Texas A&M University, College Station, Texas 77843, and New Mexico State University, Las Cruces, New Mexico 88003
| | - Thomas McCleskey
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Texas A&M University, College Station, Texas 77843, and New Mexico State University, Las Cruces, New Mexico 88003
| | - Anthony Burrell
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Texas A&M University, College Station, Texas 77843, and New Mexico State University, Las Cruces, New Mexico 88003
| | - Xinghang Zhang
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Texas A&M University, College Station, Texas 77843, and New Mexico State University, Las Cruces, New Mexico 88003
| | - Michael Nastasi
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Texas A&M University, College Station, Texas 77843, and New Mexico State University, Las Cruces, New Mexico 88003
| | - Quanxi Jia
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Texas A&M University, College Station, Texas 77843, and New Mexico State University, Las Cruces, New Mexico 88003
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8
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Larabi C, Merle N, Norsic S, Taoufik M, Baudouin A, Lucas C, Thivolle-Cazat J, de Mallmann A, Basset JM. Surface Organometallic Chemistry of Titanium on Silica−Alumina and Catalytic Hydrogenolysis of Waxes at Low Temperature. Organometallics 2009. [DOI: 10.1021/om900151a] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Cherif Larabi
- Université Lyon 1, Institut de Chimie de Lyon, Lyon, France, Université Lyon 1, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, Bâtiment 308 F − CPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Nicolas Merle
- Université Lyon 1, Institut de Chimie de Lyon, Lyon, France, Université Lyon 1, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, Bâtiment 308 F − CPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Sébastien Norsic
- Université Lyon 1, Institut de Chimie de Lyon, Lyon, France, Université Lyon 1, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, Bâtiment 308 F − CPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Mostafa Taoufik
- Université Lyon 1, Institut de Chimie de Lyon, Lyon, France, Université Lyon 1, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, Bâtiment 308 F − CPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Anne Baudouin
- Université Lyon 1, Institut de Chimie de Lyon, Lyon, France, Université Lyon 1, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, Bâtiment 308 F − CPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Christine Lucas
- Université Lyon 1, Institut de Chimie de Lyon, Lyon, France, Université Lyon 1, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, Bâtiment 308 F − CPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Jean Thivolle-Cazat
- Université Lyon 1, Institut de Chimie de Lyon, Lyon, France, Université Lyon 1, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, Bâtiment 308 F − CPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Aimery de Mallmann
- Université Lyon 1, Institut de Chimie de Lyon, Lyon, France, Université Lyon 1, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, Bâtiment 308 F − CPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Jean-Marie Basset
- Université Lyon 1, Institut de Chimie de Lyon, Lyon, France, Université Lyon 1, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, Bâtiment 308 F − CPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616 Villeurbanne, France
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9
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Siaj M, Temprano I, Dubuc N, McBreen PH. Preparation and olefin-metathesis activity of cyclopentylidene-oxo initiator sites on a molybdenum carbide surface. J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2006.09.033] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Fenno RD, Halls MD, Raghavachari K. Hafnium Oxide and Zirconium Oxide Atomic Layer Deposition: Initial Precursor and Potential Side-Reaction Product Pathways with H/Si(100)-2×1. J Phys Chem B 2005; 109:4969-76. [PMID: 16863156 DOI: 10.1021/jp048663g] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hybrid density functional calculations have been carried out using cluster models of the H/Si(100)-2 x 1 surface to investigate the mechanistic details of the initial surface reactions occurring in the atomic layer deposition of hafnium and zirconium oxides (HfO2 and ZrO2). Reaction pathways involving the metal precursors ZrCl4, Zr(CH3)4, HfCl4, and Hf(CH3)4 have been examined. Pathways leading to the formation of a Zr-Si or Hf-Si linkage show a significant sensitivity to the identity of the leaving group, with chloride loss reactions being both kinetically and thermodynamically less favorable than reactions leading to the loss of a methyl group. The energetics of the Zr(CH3)4 and Hf(CH3)4 reactions are similar with an overall exothermicity of 0.3-0.4 eV and a classical barrier height of 1.1-1.2 eV. For the reaction between H2O and the H/Si(100)-2 x 1 surface, the activation energy and overall reaction enthalpy are 1.6 and -0.8 eV, respectively. Due to contamination, trace amounts of H2O may be encountered by metal precursors, leading to the formation of minor species that can lead to unanticipated side-reaction pathways. Such gas-phase reactions between the halogenated and alkylated metal precursors and H2O are exothermic with small or no reaction barriers, allowing for the possibility of metal precursor hydroxylation before the H/Si surface is encountered. Of the contaminant surface reaction pathways, the most kinetically favorable corresponds to the surface -OH deposition. Interestingly, for the hydroxylated metal precursors, a unique reaction pathway resulting in the direct formation of Si-O-Zr and Si-O-Hf linkages has been identified and found to be the most thermodynamically stable pathway available, being exothermic by approximately 1.0 eV.
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Affiliation(s)
- Ryan D Fenno
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, USA
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11
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Siaj M, Reed C, Oyama ST, Scott SL, McBreen PH. Dissociation of acetaldehyde on beta-Mo2C to yield ethylidene and oxo surface groups: a possible pathway for active site formation in heterogeneous olefin metathesis. J Am Chem Soc 2004; 126:9514-5. [PMID: 15291535 DOI: 10.1021/ja048640f] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The dissociative adsorption of acetaldehyde on beta-Mo2C was studied using reflection absorption infrared spectroscopy. In contrast to what is observed for all metals previously studied, acetaldehyde undergoes selective carbonyl bond scission on the carbide surface. By comparison to calculated spectra, the surface product is identified as an oxo-ethylidene species. The study thus provides the first extended-range infrared spectrum of a propene metathesis initiator or propagator alkylidene. Aldehydes may be formed in the presence of olefins during the induction period of supported metal oxide olefin metathesis catalysts. Hence, the observed dissociative chemisorption of acetaldehyde suggests a possible answer to the question of how initiator sites are formed in heterogeneous olefin metathesis. This question has never been satisfactorily answered. In the proposed mechanism, aldehydes formed during the induction period subsequently react with the catalyst surface to generate alkylidene sites.
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Affiliation(s)
- Mohamed Siaj
- Département de chimie, Université Laval, Québec (PQ), Canada G1K 7P4
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12
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Alladin T, Beaudoin MC, Scott SL. Thermolysis of silica-supported bis(neopentyl) complexes of titanium and zirconium. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(02)01272-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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13
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Affiliation(s)
- Richard R Schrock
- Department of Chemistry 6-331, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
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14
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Zahidi EM, Oudghiri-Hassani H, McBreen PH. Formation of thermally stable alkylidene layers on a catalytically active surface. Nature 2001; 409:1023-6. [PMID: 11234007 DOI: 10.1038/35059047] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Materials containing organic-inorganic interfaces usually display a combination of molecular and solid-state properties, which are of interest for applications ranging from chemical sensing to microelectronics and catalysis. Thiols--organic compounds carrying a SH group--are widely used to anchor organic layers to gold surfaces, because gold is catalytically sufficiently active to replace relatively weak S-H bonds with Au-S bonds, yet too inert to attack C-C and C-H bonds in the organic layer. But although several methods of functionalizing the surfaces of semiconductors, oxides and metals are known, it remains difficult to attach a wide range of more complex organic species. Organic layers could, in principle, be formed on the surfaces of metals that are capable of inserting into strong bonds, but such surfaces catalyse the decomposition of organic layers at temperatures above 400 to 600 K, through progressive C-H and C-C bond breaking. Here we report that cycloketones adsorbed on molybdenum carbide, a material known to catalyse a variety of hydrocarbon conversion reactions, transform into surface-bound alkylidenes stable to above 900 K. We expect that this chemistry can be used to create a wide range of exceptionally stable organic layers on molybdenum carbide.
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Affiliation(s)
- E M Zahidi
- Départment de Chimie et CERPIC, Université Laval, Québec, Canada
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15
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Beckhaus R, Santamarı́a C. Carbene complexes of titanium group metals—formation and reactivity. J Organomet Chem 2001. [DOI: 10.1016/s0022-328x(00)00710-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Doxsee KM, Juliette JJ. Regioselectivity of metallacycle formation via intramolecular CH activation. Polyhedron 2000. [DOI: 10.1016/s0277-5387(00)00325-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Abarca A, Gómez-Sal P, Martín A, Mena M, Poblet JM, Yélamos C. Ammonolysis of mono(pentamethylcyclopentadienyl) titanium(IV) derivatives. Inorg Chem 2000; 39:642-51. [PMID: 11272557 DOI: 10.1021/ic9907718] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ammonolyses of mono(pentamethylcyclopentadienyl) titanium(IV) derivatives [Ti(eta5-C5Me5)X3] (X = NMe2, Me, Cl) have been carried out in solution to give polynuclear nitrido complexes. Reaction of the tris(dimethylamido) derivative [Ti(eta5-C5Me5)(NMe2)3] with excess of ammonia at 80-100 degrees C gives the cubane complex [[Ti(eta5-C5Me5)]4(mu3-N)4] (1). Treatment of the trimethyl derivative [Ti(eta5-C5Me5)Me3] with NH3 at room temperature leads to the trinuclear imido-nitrido complex [[Ti(eta/5-CsMes)(mu-NH)]3(mu3-N)] (2) via the intermediate [[Ti(eta5-C5Me5)Me]2(mu-NH)2] (3). The analogous reaction of [Ti(eta5-C5Me5)Me3] with 2,4,6-trimethylaniline (ArNH2) gives the dinuclear imido complex [[Ti(eta5-C5Me5)Me])2(mu-NAr)2] (4) which reacts with ammonia to afford [[Ti(eta5-C5Me5)(NH2)]2(mu-NAr)2] (5). Complex 2 has been used, by treatments with the tris(dimethylamido) derivatives [Ti(eta5-C5H5-nRn)(NMe2)3], as precursor of the cubane nitrido systems [[Ti4(eta5-C5Me5)3(eta5-C5H5-nRn)](mu3-N)4] [R = Me n = 5 (1), R = H n = 0 (6), R = SiMe3 n = 1 (7), R = Me n = 1 (8)] via dimethylamine elimination. Reaction of [Ti(eta5-C5Me5)Cl3] or [Ti(eta5-C5Me5)(NMe2)Cl2] with excess of ammonia at room temperature gives the dinuclear complex [[Ti2(eta5-C5Me5)2Cl3(NH3)](mu-N)] (9) where an intramolecular hydrogen bonding and a nonlineal nitrido ligand bridge the "Ti(eta5-C5Me5)Cl(NH3)" and "Ti(eta5-C5Me5)Cl2" moieties. The molecular structures of [[Ti(eta5-C5Me5)Me]2 (mu-NAr)2] (4) and [[Ti2(eta5-C5Me5)2Cl3(NH3)](mu-N)] (9) have been determined by X-ray crystallographic studies. Density functional theory calculations also have been conducted on complex 9 to confirm the existence of an intramolecular N-H...Cl hydrogen bond and to evaluate different aspects of its molecular disposition.
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Affiliation(s)
- A Abarca
- Departamento de Química Inorgánica, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
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18
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Wu YD, Peng ZH, Chan KWK, Liu X, Tuinman AA, Xue Z. Computational and Experimental Studies on the Thermolysis Mechanism of Zirconium and Hafnium Tetraalkyl Complexes. Difference between Titanium and Zirconium Complexes. Organometallics 1999. [DOI: 10.1021/om980595v] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Yun-Dong Wu
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600
| | - Zhi-Hui Peng
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600
| | - Kyle W. K. Chan
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600
| | - Xiaozhan Liu
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600
| | - Albert A. Tuinman
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600
| | - Ziling Xue
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: annual survey covering the year 1997. Coord Chem Rev 1999. [DOI: 10.1016/s0010-8545(98)00219-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Galakhov M, Gómez-Sal P, Martín A, Mena M, Yélamos C. Thermal Decomposition of (Pentamethylcyclopentadienyl)titanium(IV) Complexes Containing Dialkylamido Ligands – X-ray Structure of [{η5:η2-C5Me4CH2CH2N(Me)CN(C6H3Me2)}TiCl2]. Eur J Inorg Chem 1998. [DOI: 10.1002/(sici)1099-0682(199809)1998:9<1319::aid-ejic1319>3.0.co;2-k] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Cheon J, Rogers DM, Girolami GS. Mechanistic Studies of the Thermolysis of Tetraneopentyltitanium(IV). 1. Solution Evidence That Titanium Alkylidenes Activate Saturated Hydrocarbons. J Am Chem Soc 1997. [DOI: 10.1021/ja970811b] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jinwoo Cheon
- Contribution from the School of Chemical Sciences and Materials Research Laboratory, University of Illinois at UrbanaChampaign, 601 South Goodwin Avenue, Urbana, Illinois 61801
| | - Deborah M. Rogers
- Contribution from the School of Chemical Sciences and Materials Research Laboratory, University of Illinois at UrbanaChampaign, 601 South Goodwin Avenue, Urbana, Illinois 61801
| | - Gregory S. Girolami
- Contribution from the School of Chemical Sciences and Materials Research Laboratory, University of Illinois at UrbanaChampaign, 601 South Goodwin Avenue, Urbana, Illinois 61801
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