1
|
Pavun A, Kopacka H, Wurst K, Müller T, Neururer FR, Hohloch S, Bildstein B. Tromancenium complexes with steric and electronic modulation. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
2
|
Hyun HR, Han J, Lim J, Park YJ, Choi B, Baik C, Kim JS. Liquid-like properties of cyclopentadienyl complexes of barium: molecular dynamics simulations of nanoscale droplets. Phys Chem Chem Phys 2022; 24:15982-15990. [PMID: 35730698 DOI: 10.1039/d2cp02322a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyclopentadienyl complexes of barium have great utility in materials science and engineering, in particular, as precursors in the atomic layer deposition processes, which are required to be fluidic as well as thermally stable and volatile. Here, we investigated the liquid-like properties of cyclopentadienyl barium complexes including (Me5C5)2Ba, (tBu3C5H2)2Ba, (iPr4C5H)2Ba, (iPr5C5)2Ba, and [(SiMe3)3C5H2]2Ba, using molecular dynamics simulations of nanoscale droplets. The compounds were modeled using a recently developed generic force field, GFN-FF. Nanoscale droplets with about 5.0 nm diameters were formed by aggregating 96 molecules of each compound. Simulation results reveal that substituting methyl groups of (Me5C5)2Ba with other alkyl and silyl moieties has a non-negligible effect on the intra- and intermolecular structure and dynamics. In particular, in contrast to more flexible (Me5C5)2Ba, the substitution with five iso-propyl groups to form (iPr5C5)2Ba adds rigidity to the complex with restricted orientational fluctuations for two cyclopentadienyl ligands and arranges molecules parallel to each other with greater probability. In addition, comparison between (tBu3C5H2)2Ba, with three tert-butyl groups, and its silyl analogue, [(SiMe3)3C5H2]2Ba, reveals that intermolecular interactions between the molecules with silyl groups are softer than those with tert-butyl groups and result in broader radial distribution functions, whereas the dynamic properties are similar for both compounds. This work suggests that molecular dynamics simulations contribute to molecular-level understanding of the effect of chemical substitution in organometallic compounds on the intra- and intermolecular properties of molecular liquids.
Collapse
Affiliation(s)
- Hye Ree Hyun
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Republic of Korea.
| | - Jungim Han
- Organic Material Lab, Samsung Advanced Institute of Technology, Suwon, Gyeonggi-do 16678, Republic of Korea.
| | - Juhyung Lim
- Organic Material Lab, Samsung Advanced Institute of Technology, Suwon, Gyeonggi-do 16678, Republic of Korea.
| | - Young Jae Park
- Organic Material Lab, Samsung Advanced Institute of Technology, Suwon, Gyeonggi-do 16678, Republic of Korea.
| | - Byoungki Choi
- Organic Material Lab, Samsung Advanced Institute of Technology, Suwon, Gyeonggi-do 16678, Republic of Korea.
| | - Chul Baik
- Organic Material Lab, Samsung Advanced Institute of Technology, Suwon, Gyeonggi-do 16678, Republic of Korea.
| | - Jun Soo Kim
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Republic of Korea.
| |
Collapse
|
3
|
Sun X, Singh AK, Yadav R, Jin D, Haimerl M, Scheer M, Roesky PW. Triple-decker complexes incorporating three distinct deck architectures. Chem Commun (Camb) 2021; 58:673-676. [PMID: 34919113 DOI: 10.1039/d1cc06182h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The reactivity of the dilithioplumbole ([Li2(thf)2(μ,η5-LPb)], LPb = 1,4-bis-tert-butyl-dimethylsilyl-2,3-bis-phenyl-plumbolyl) towards the reactive pnictogen precursors P4, pentaphosphaferrocene, and pentaarsaferrocene ([Cp*Fe(η5-E5)] (Cp* = η5-C5Me5, E = P, As)) is reported. The reaction with P4 afforded a phospholyl lithium complex, via lead-phosphorus exchange, while the reactions with [Cp*Fe(η5-E5)] yielded the first examples of Pb-Fe-Li heterotrimetallic triple-decker polypnictogenides with three different deck motifs.
Collapse
Affiliation(s)
- Xiaofei Sun
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstraße 15, Karlsruhe, 76131, Germany.
| | - Akhil Kumar Singh
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstraße 15, Karlsruhe, 76131, Germany.
| | - Ravi Yadav
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstraße 15, Karlsruhe, 76131, Germany.
| | - Da Jin
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstraße 15, Karlsruhe, 76131, Germany.
| | - Maria Haimerl
- Institute of Inorganic Chemistry, University of Regensburg, Regensburg 93040, Germany
| | - Manfred Scheer
- Institute of Inorganic Chemistry, University of Regensburg, Regensburg 93040, Germany
| | - Peter W Roesky
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstraße 15, Karlsruhe, 76131, Germany.
| |
Collapse
|
4
|
Boreen MA, Lussier DJ, Skeel BA, Lohrey TD, Watt FA, Shuh DK, Long JR, Hohloch S, Arnold J. Structural, Electrochemical, and Magnetic Studies of Bulky Uranium(III) and Uranium(IV) Metallocenes. Inorg Chem 2019; 58:16629-16641. [DOI: 10.1021/acs.inorgchem.9b02719] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Michael A. Boreen
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Daniel J. Lussier
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Brighton A. Skeel
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Trevor D. Lohrey
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Fabian A. Watt
- University of Paderborn, Warburger Straße 100, 33098 Paderborn, Germany
| | - David K. Shuh
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Jeffrey R. Long
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Stephan Hohloch
- University of Paderborn, Warburger Straße 100, 33098 Paderborn, Germany
| | - John Arnold
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| |
Collapse
|
5
|
Ketkov S, Rychagova E. Electronic excited states of mixed sandwich complexes, (η7-C7H7)(η5-C5H5)M (M = V, Cr): Investigation with time-dependent density functional theory. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.12.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
6
|
Raeder J, Reiners M, Baumgarten R, Münster K, Baabe D, Freytag M, Jones PG, Walter MD. Synthesis and molecular structure of pentadienyl complexes of the rare-earth metals. Dalton Trans 2018; 47:14468-14482. [DOI: 10.1039/c8dt03123a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
In combination with small and difficult to reduce rare-earth metals pdl′ undergoes CH-bond activations instead of sterically induced reductions to form dimeric complexes with a unique bridging six-membered metallacycle as the central structural motif.
Collapse
Affiliation(s)
- Jan Raeder
- Technische Universität Braunschweig
- Institut für Anorganische und Analytische Chemie
- 38106 Braunschweig
- Germany
| | - Matthias Reiners
- Technische Universität Braunschweig
- Institut für Anorganische und Analytische Chemie
- 38106 Braunschweig
- Germany
| | - Robert Baumgarten
- Technische Universität Braunschweig
- Institut für Anorganische und Analytische Chemie
- 38106 Braunschweig
- Germany
| | - Katharina Münster
- Technische Universität Braunschweig
- Institut für Anorganische und Analytische Chemie
- 38106 Braunschweig
- Germany
| | - Dirk Baabe
- Technische Universität Braunschweig
- Institut für Anorganische und Analytische Chemie
- 38106 Braunschweig
- Germany
| | - Matthias Freytag
- Technische Universität Braunschweig
- Institut für Anorganische und Analytische Chemie
- 38106 Braunschweig
- Germany
| | - Peter G. Jones
- Technische Universität Braunschweig
- Institut für Anorganische und Analytische Chemie
- 38106 Braunschweig
- Germany
| | - Marc D. Walter
- Technische Universität Braunschweig
- Institut für Anorganische und Analytische Chemie
- 38106 Braunschweig
- Germany
| |
Collapse
|
7
|
Piou T, Romanov-Michailidis F, Romanova-Michaelides M, Jackson KE, Semakul N, Taggart TD, Newell BS, Rithner CD, Paton RS, Rovis T. Correlating Reactivity and Selectivity to Cyclopentadienyl Ligand Properties in Rh(III)-Catalyzed C-H Activation Reactions: An Experimental and Computational Study. J Am Chem Soc 2017; 139:1296-1310. [PMID: 28060499 PMCID: PMC5545783 DOI: 10.1021/jacs.6b11670] [Citation(s) in RCA: 146] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
CpXRh(III)-catalyzed C-H functionalization reactions are a proven method for the efficient assembly of small molecules. However, rationalization of the effects of cyclopentadienyl (CpX) ligand structure on reaction rate and selectivity has been viewed as a black box, and a truly systematic study is lacking. Consequently, predicting the outcomes of these reactions is challenging because subtle variations in ligand structure can cause notable changes in reaction behavior. A predictive tool is, nonetheless, of considerable value to the community as it would greatly accelerate reaction development. Designing a data set in which the steric and electronic properties of the CpXRh(III) catalysts were systematically varied allowed us to apply multivariate linear regression algorithms to establish correlations between these catalyst-based descriptors and the regio-, diastereoselectivity, and rate of model reactions. This, in turn, led to the development of quantitative predictive models that describe catalyst performance. Our newly described cone angles and Sterimol parameters for CpX ligands served as highly correlative steric descriptors in the regression models. Through rational design of training and validation sets, key diastereoselectivity outliers were identified. Computations reveal the origins of the outstanding stereoinduction displayed by these outliers. The results are consistent with partial η5-η3 ligand slippage that occurs in the transition state of the selectivity-determining step. In addition to the instructive value of our study, we believe that the insights gained are transposable to other group 9 transition metals and pave the way toward rational design of C-H functionalization catalysts.
Collapse
Affiliation(s)
- Tiffany Piou
- Department of Chemistry, Columbia University, New York, NY 10027, USA
- Department of Chemistry, Colorado State University, Ft. Collins, Colorado 80523, USA
| | - Fedor Romanov-Michailidis
- Department of Chemistry, Columbia University, New York, NY 10027, USA
- Department of Chemistry, Colorado State University, Ft. Collins, Colorado 80523, USA
| | | | - Kelvin E. Jackson
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
| | - Natthawat Semakul
- Department of Chemistry, Columbia University, New York, NY 10027, USA
- Department of Chemistry, Colorado State University, Ft. Collins, Colorado 80523, USA
| | - Trevor D. Taggart
- Department of Chemistry, Colorado State University, Ft. Collins, Colorado 80523, USA
| | - Brian S. Newell
- Department of Chemistry, Colorado State University, Ft. Collins, Colorado 80523, USA
| | | | - Robert S. Paton
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
| | - Tomislav Rovis
- Department of Chemistry, Columbia University, New York, NY 10027, USA
- Department of Chemistry, Colorado State University, Ft. Collins, Colorado 80523, USA
| |
Collapse
|
8
|
Cycloheptatrienyl dicarbollyl zirconium complexes: Building blocks for the preparation of multidecker sandwich complexes. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.11.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
9
|
Bauer H, Wallasch MW, Wolmershäuser G, Sun Y, Sitzmann H. Iron(III) Half‐Sandwich Complexes of the Two‐Legged Piano‐Stool [CpFe(aryl)Cl] Type from the Corresponding Aryliron(II) Precursors. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201601026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Heiko Bauer
- Fachbereich Chemie TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Mark W. Wallasch
- Fachbereich Chemie TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Gotthelf Wolmershäuser
- Fachbereich Chemie TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Yu Sun
- Fachbereich Chemie TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Helmut Sitzmann
- Fachbereich Chemie TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| |
Collapse
|
10
|
Bauer H, Weismann J, Saurenz D, Färber C, Schär M, Gidt W, Schädlich I, Wolmershäuser G, Sun Y, Harder S, Sitzmann H. Chromocene, ferrocene, cobaltocene, and nickelocene derivatives with isopropyl and methyl or trimethylsilyl substituents. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.02.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
11
|
Fecker AC, Freytag M, Jones PG, Zhao N, Zi G, Walter MD. Preparation of enantiomerically pure open calcocene and strontocene complexes and their application in ring opening polymerizations of rac-lactide. Dalton Trans 2015; 44:16325-31. [PMID: 26299415 DOI: 10.1039/c5dt02851e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The synthesis of C2 symmetric enantiomerically pure open Ca and Sr metallocenes, [(η(5)-pdl*)2Ca(thf)] (1) and [(η(5)-pdl*)2Sr(thf)2] (2) (pdl* = dimethylnopadienyl) is described and these complexes were fully characterized. The solid state structures confirm that the pdl* ligands coordinate exclusively with the less sterically demanding site to the Ca and Sr atoms. These complexes are active catalysts for the controlled ring opening polymerization (ROP) of rac-lactide to give heterotactically enriched polylactides (PL) with narrow polydispersities (PDI = 1.29-1.31) and without adding further activators.
Collapse
Affiliation(s)
- Ann Christin Fecker
- Institut für Anorganische und Analytische Chemie, Technische Universität, Braunschweig, Hagenring 30, 38106 Braunschweig, Germany.
| | | | | | | | | | | |
Collapse
|
12
|
Fecker AC, Crăciun BF, Schweyen P, Freytag M, Jones PG, Walter MD. Synthesis and Characterization of N-Donor-Functionalized Enantiomerically Pure Pentadienyl Ligands Derived from (1R)-(−)-Myrtenal. Organometallics 2014. [DOI: 10.1021/om501024j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ann Christin Fecker
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring
30, 38106 Braunschweig, Germany
| | - Bogdan-Florin Crăciun
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring
30, 38106 Braunschweig, Germany
| | - Peter Schweyen
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring
30, 38106 Braunschweig, Germany
| | - Matthias Freytag
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring
30, 38106 Braunschweig, Germany
| | - Peter G. Jones
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring
30, 38106 Braunschweig, Germany
| | - Marc D. Walter
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring
30, 38106 Braunschweig, Germany
| |
Collapse
|