1
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Kuzu MY, Schmidt A, Strohmann C. Enantioselective Synthesis of Phosphine Boranes via Crystallization-Induced Dynamic Resolution of Lithiated Intermediate by Understanding the Underlying Epimerization Process. Angew Chem Int Ed Engl 2024; 63:e202319665. [PMID: 38427610 DOI: 10.1002/anie.202319665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 02/13/2024] [Accepted: 02/19/2024] [Indexed: 03/03/2024]
Abstract
Described herein is the successful crystallization-induced dynamic resolution (CIDR) of an α-lithiated phosphine borane utilizing the easily accessible and inexpensive ligand (R,R)-TMCDA. Starting from the essential P-prochiral building block dimethyl phenyl phosphine borane we were able to obtain phosphine boranes in yields up to 80 % and e.r. up to 98 : 2 by crystallization of the lithiated intermediate prior to the trapping reaction. NMR-based deuterium labeling experiments indicate that the epimerization in solution is based on the intermolecular proton transfer between nonlithiated phosphine borane and the corresponding lithiated intermediate, rendering the presence of the remaining starting compound in an optimized solvent mixture the main factor for successful enantioselective synthesis. Quantum chemical calculations using different model systems based on solid state structures confirm these experimental results. By gaining insights into the epimerization mechanism, essential principles for CIDR of lithiated phosphine boranes are elucidated that may be expanded to other important P-stereogenic compounds and simple chiral amines.
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Affiliation(s)
- Mehmet Yasin Kuzu
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Annika Schmidt
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Carsten Strohmann
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
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2
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Brieger L, Schrimpf T, Scheel R, Unkelbach C, Strohmann C. Towards Substrate-Reagent Interaction of Lochmann-Schlosser Bases in THF: Bridging THF Hides Potential Reaction Site of a Chiral Superbase. Chemistry 2022; 28:e202202660. [PMID: 36098179 PMCID: PMC10092790 DOI: 10.1002/chem.202202660] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Indexed: 12/14/2022]
Abstract
The metalation of N,N-dimethylaminomethylferrocene in THF by the superbasic mixture of n BuLi/KOt Bu proceeds readily at low temperatures to afford a bimetallic Li2 K2 aggregate containing ferrocenyl anions and tert-butoxide. Starting from an enantiomerically enriched ortho-lithiated aminomethylferrocene, an enantiomerically pure superbase can be prepared. The molecular compound exhibits superbasic behavior deprotonating N,N-dimethylbenzylamine in the α-position and is also capable of deprotonating toluene. Quantum chemical calculations provide insight into the role of the bridging THF molecule to the possible substrate-reagent interaction. In addition, a benzylpotassium alkoxide adduct gives a closer look into the corresponding reaction site of the Lochmann-Schlosser base that is reported herein.
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Affiliation(s)
- Lukas Brieger
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Str. 6/6a, 44227, Dortmund, Germany
| | - Tobias Schrimpf
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Str. 6/6a, 44227, Dortmund, Germany
| | - Rebecca Scheel
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Str. 6/6a, 44227, Dortmund, Germany
| | - Christian Unkelbach
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Str. 6/6a, 44227, Dortmund, Germany
| | - Carsten Strohmann
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Str. 6/6a, 44227, Dortmund, Germany
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3
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Choi TH, Leung WP, Lee HK, Chan YC. Metalation of 2‐quinolyl‐linked (boranophosphinoyl)methane. Alkali Metal, Alkaline Earth Metal and Ytterbium(II) Complexes of Monoanionic [CH(iPr2P–BH3)(C9H6N‐2)]– Ligand. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tsz-Hei Choi
- The Chinese University of Hong Kong Department of Chemistry HONG KONG
| | - Wing-Por Leung
- The Chinese University of Hong Kong Department of Chemistry HONG KONG
| | - Hung Kay Lee
- The Chinese University of Hong Kong Chemistry The Chinese University of Hong Kong 1 Shatin HONG KONG
| | - Yuk-Chi Chan
- The Chinese University of Hong Kong Department of Chemistry HONG KONG
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4
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Izod K, Wills C, El-Hamruni S, Harrington RW, Waddell PG, Probert MR. Structural Diversity in Alkaline Earth Metal Complexes of a Phosphine-Borane-Stabilized 1,3-Dicarbanion. Organometallics 2015. [DOI: 10.1021/om501183p] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Keith Izod
- Main Group Chemistry Laboratories,
School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, U.K
| | - Corinne Wills
- Main Group Chemistry Laboratories,
School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, U.K
| | - Salima El-Hamruni
- Main Group Chemistry Laboratories,
School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, U.K
| | - Ross W. Harrington
- Main Group Chemistry Laboratories,
School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, U.K
| | - Paul G. Waddell
- Main Group Chemistry Laboratories,
School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, U.K
| | - Michael R. Probert
- Main Group Chemistry Laboratories,
School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, U.K
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5
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Langer J, Geitner R, Görls H. Tris(borane) Adducts of Diphosphanylmethanides: The [H
3
BCH(PPh
2
BH
3
)
2
]
–
Anion and Its Alkali Metal Complexes. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402845] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jens Langer
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstrasse 8, 07743 Jena, Germany, http://www.lsac1.uni‐jena.de/Mitarbeiter/Dr_+J_+Langer.html
| | - Robert Geitner
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstrasse 8, 07743 Jena, Germany, http://www.lsac1.uni‐jena.de/Mitarbeiter/Dr_+J_+Langer.html
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstrasse 8, 07743 Jena, Germany, http://www.lsac1.uni‐jena.de/Mitarbeiter/Dr_+J_+Langer.html
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6
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Izod K, Wills C, Anderson E, Harrington RW, Probert MR. Insights into the Stability and Structures of Phosphine-Boranes and Their α-Metalated Derivatives. Organometallics 2014. [DOI: 10.1021/om5005995] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Keith Izod
- Main Group Chemistry Laboratories,
School of Chemistry, Newcastle University, Bedson Building, Newcastle upon Tyne, NE1 7RU, U.K
| | - Corinne Wills
- Main Group Chemistry Laboratories,
School of Chemistry, Newcastle University, Bedson Building, Newcastle upon Tyne, NE1 7RU, U.K
| | - Emma Anderson
- Main Group Chemistry Laboratories,
School of Chemistry, Newcastle University, Bedson Building, Newcastle upon Tyne, NE1 7RU, U.K
| | - Ross W. Harrington
- Main Group Chemistry Laboratories,
School of Chemistry, Newcastle University, Bedson Building, Newcastle upon Tyne, NE1 7RU, U.K
| | - Michael R. Probert
- Main Group Chemistry Laboratories,
School of Chemistry, Newcastle University, Bedson Building, Newcastle upon Tyne, NE1 7RU, U.K
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7
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Langer J, Görls H. Synthesis, characterization and reactivity of potassium and barium complexes containing phosphane-borane stabilized methanides. Dalton Trans 2014; 43:458-68. [PMID: 24105349 DOI: 10.1039/c3dt52257a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The polymeric potassium complex [K{CH(PPh2BH3)2}]∞ (1) was prepared and used as a starting material for the syntheses of related N,N,N',N'-tetramethylethylenediamine (tmeda) and N,N,N',N',N''-pentamethyldiethylenetriamine (pmdta) ligated potassium derivatives [K{CH(PPh2BH3)2}(tmeda)2]∞ (2) and [K{CH(PPh2BH3)2}(pmdta)]2 (3). Salt metathesis reactions with [BaI2(thf)5] allowed the synthesis of the barium derivatives [BaI{CH(PPh2BH3)2}(thf)5] (5) and [Ba{CH(PPh2BH3)2}2(solv)2}] (solv = Et2O, thf) (6), which are more prone to subsequent reactions than the potassium derivatives. One of the resulting products, [Ba4O{CH(PPh2BH3)2}3{Ph2PCH(BH3)PPh2BH3}3] (7), which contains two different isomeric forms of the bis(borane) adduct of Ph2PCHPPh2, was isolated. The complexes were characterized by NMR techniques and single crystal X-ray diffraction measurements.
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Affiliation(s)
- Jens Langer
- Institute of Inorganic and Analytical Chemistry, Friedrich-Schiller-University Jena, Humboldtstraße 8, D-07743 Jena, Germany.
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8
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Izod K, Dixon CM, McMeekin E, Rodgers L, Harrington RW, Baisch U. Synthesis and Structural Characterization of Phosphine–Borane-Stabilized Dicarbanions with either Rigid or Flexible Spacers. Organometallics 2013. [DOI: 10.1021/om4011142] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Keith Izod
- Main Group Chemistry
Laboratories, School of
Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne NE1
7RU, U.K
| | - Casey M. Dixon
- Main Group Chemistry
Laboratories, School of
Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne NE1
7RU, U.K
| | - Emma McMeekin
- Main Group Chemistry
Laboratories, School of
Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne NE1
7RU, U.K
| | - Lee Rodgers
- Main Group Chemistry
Laboratories, School of
Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne NE1
7RU, U.K
| | - Ross W. Harrington
- Main Group Chemistry
Laboratories, School of
Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne NE1
7RU, U.K
| | - Ulrich Baisch
- Department of Chemistry, University of Malta, Msida MSD 2080, Malta
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9
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Langer J, Pálfi VK, Görls H, Reiher M, Westerhausen M. Formation of a Ph2PCH(BH3)P(BH3)Ph2 ligand via formal 1,2-borane migration. Chem Commun (Camb) 2013; 49:1121-3. [PMID: 23283205 DOI: 10.1039/c2cc38098f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The transfer of the anionic Ph(2)P(BH(3))-CH-P(BH(3))Ph(2) ligand from potassium to barium results in the subsequent formation of a tetranuclear barium cluster which contains the hitherto unknown isomeric form Ph(2)P-CH(BH(3))-P(BH(3))Ph(2) of the ligand.
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Affiliation(s)
- Jens Langer
- Institute of Inorganic and Analytical Chemistry, Friedrich-Schiller-University Jena, Humboldtstrasse 8, D-07743 Jena, Germany.
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10
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Synthesis and structural characterisation of an unusual phosphine-borane-substituted organoplumbate. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2012.12.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Barozzino Consiglio G, Queval P, Harrison-Marchand A, Mordini A, Lohier JF, Delacroix O, Gaumont AC, Gérard H, Maddaluno J, Oulyadi H. Ph2P(BH3)Li: From Ditopicity to Dual Reactivity. J Am Chem Soc 2011; 133:6472-80. [DOI: 10.1021/ja201760c] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gabriella Barozzino Consiglio
- CNRS UMR 6014 & FR 3038, Université de Rouen and INSA de Rouen, 76821 Mont St Aignan Cedex, France
- ICCOM, Dipartimento di Chimica “U. Schiff”, Universita’ di Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino, Firenze, Italy
| | - Pierre Queval
- Laboratoire de Chimie Moléculaire et Thio-organique, CNRS UMR 6507 & FR 3038, ENSICAEN and Université de Caen, 14050 Caen, France
| | - Anne Harrison-Marchand
- CNRS UMR 6014 & FR 3038, Université de Rouen and INSA de Rouen, 76821 Mont St Aignan Cedex, France
| | - Alessandro Mordini
- ICCOM, Dipartimento di Chimica “U. Schiff”, Universita’ di Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino, Firenze, Italy
| | - Jean-François Lohier
- Laboratoire de Chimie Moléculaire et Thio-organique, CNRS UMR 6507 & FR 3038, ENSICAEN and Université de Caen, 14050 Caen, France
| | - Olivier Delacroix
- Laboratoire de Chimie Moléculaire et Thio-organique, CNRS UMR 6507 & FR 3038, ENSICAEN and Université de Caen, 14050 Caen, France
| | - Annie-Claude Gaumont
- Laboratoire de Chimie Moléculaire et Thio-organique, CNRS UMR 6507 & FR 3038, ENSICAEN and Université de Caen, 14050 Caen, France
| | - Hélène Gérard
- CNRS UMR 7616, LCT, UPMC Université Paris 6, 4 place Jussieu, 75252 Paris Cedex 05, France
| | - Jacques Maddaluno
- CNRS UMR 6014 & FR 3038, Université de Rouen and INSA de Rouen, 76821 Mont St Aignan Cedex, France
| | - Hassan Oulyadi
- CNRS UMR 6014 & FR 3038, Université de Rouen and INSA de Rouen, 76821 Mont St Aignan Cedex, France
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12
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Izod K, Clegg W, Harrington RW. Lanthanide(II) complexes of a phosphine-borane-stabilised carbanion. Dalton Trans 2010; 39:6705-9. [PMID: 20480086 DOI: 10.1039/c001468k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction between two equivalents of the potassium salt [(Me(3)Si)(2){Me(2)P(BH(3))}C]K (4) and SmI(2)(THF)(2) in refluxing THF yields the dialkylsamarium(II) compounds [(Me(3)Si)(2){Me(2)P(BH(3))}C](2)Sm(THF) (5a) or [(Me(3)Si)(2){Me(2)P(BH(3))}C](2)Sm(THF)(3) (5b), depending on the crystallisation conditions, in good yield as air- and moisture-sensitive crystalline solids. X-ray crystallography shows that, whereas both alkyl ligands chelate the samarium(II) ion in 5a, in 5b one alkyl ligand chelates the metal centre and one binds the metal only through its borane hydrogen atoms. The reaction between YbI(2) and two equivalents of 4 in refluxing benzene yields the solvent-free dialkylytterbium(II) compound [(Me(3)Si)(2){Me(2)P(BH(3))}C](2)Yb (8). In contrast to 5a and 5b, compound 8 reacts rapidly with THF to give the free phosphine-borane (Me(3)Si)(2){Me(2)P(BH(3))}CH as the only identifiable product.
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Affiliation(s)
- Keith Izod
- Main Group Chemistry Laboratories, School of Chemistry, Bedson Building, University of Newcastle, Newcastle upon Tyne, UK NE1 7RU.
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13
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Staubitz A, Robertson APM, Sloan ME, Manners I. Amine− and Phosphine−Borane Adducts: New Interest in Old Molecules. Chem Rev 2010; 110:4023-78. [DOI: 10.1021/cr100105a] [Citation(s) in RCA: 554] [Impact Index Per Article: 39.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Anne Staubitz
- School of Chemistry, University of Bristol, Bristol, U.K., BS8 1TS
| | | | - Matthew E. Sloan
- School of Chemistry, University of Bristol, Bristol, U.K., BS8 1TS
| | - Ian Manners
- School of Chemistry, University of Bristol, Bristol, U.K., BS8 1TS
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14
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Izod K, Wills C, Clegg W, Harrington RW. Synthesis, Structure, and Solution Behavior of a Phosphine−Borane-Stabilized 1,3-Dicarbanion. Organometallics 2010. [DOI: 10.1021/om100454t] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Keith Izod
- Main Group Chemistry Laboratories, School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K
| | - Corinne Wills
- Main Group Chemistry Laboratories, School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K
| | - William Clegg
- Main Group Chemistry Laboratories, School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K
| | - Ross W. Harrington
- Main Group Chemistry Laboratories, School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K
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15
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Haywood J, Wheatley AEH. Metal‐Hydride Bonding in Higher Alkali Metal Boron Monohydrides. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900756] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Joanna Haywood
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Andrew E. H. Wheatley
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
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16
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Izod K, Bowman LJ, Wills C, Clegg W, Harrington RW. Synthesis and structural characterisation of alkali metal complexes of heteroatom-stabilised 1,4- and 1,6-dicarbanions. Dalton Trans 2009:3340-7. [PMID: 19421638 DOI: 10.1039/b822054a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A straightforward Peterson olefination reaction between either [{(Me(2)PhSi)(3)C}Li(THF)] or in situ-generated [(Me(3)Si)(2){Ph(2)P(BH(3))}CLi(THF)(n)] and paraformaldehyde gives the alkenes (Me(2)PhSi)(2)C[double bond, length as m-dash]CH(2) () and (Me(3)Si){Ph(2)P(BH(3))}C[double bond, length as m-dash]CH(2) (), respectively, in good yield. Ultrasonic treatment of with lithium in THF yields the lithium complex [{(Me(2)PhSi)(2)C(CH(2))}Li(THF)(n)](2) (), which reacts in situ with one equivalent of KOBu(t) in diethyl ether to give the potassium salt [{(Me(2)PhSi)(2)C(CH(2))}K(THF)](2) (). Similarly, ultrasonic treatment of with lithium in THF yields the lithium complex [[{Ph(2)P(BH(3))}(Me(3)Si)C(CH(2))]Li(THF)(3)](2).2THF (). The bis(phosphine-borane) [(Me(3)Si){Me(2)(H(3)B)P}CH(Me(2)Si)(CH(2))](2) () may be prepared by the reaction of [Me(2)P(BH(3))CH(SiMe(3))]Li with half an equivalent of ClSiMe(2)CH(2)CH(2)SiMe(2)Cl in refluxing THF. Metalation of with two equivalents of MeLi in refluxing THF yields the lithium complex [[{Me(2)P(BH(3))}(Me(3)Si)C{(SiMe(2))(CH(2))}]Li(THF)(3)](2) (), whereas metalation with two equivalents of MeK in cold diethyl ether yields the potassium complex [[{Me(2)P(BH(3))}(Me(3)Si)C{(SiMe(2))(CH(2))}](2)K(2)(THF)(4)](infinity) () after recrystallisation. X-Ray crystallography shows that, whereas the lithium complex crystallises as a discrete molecular species, the potassium complexes and crystallise as sheet and chain polymers, respectively.
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Affiliation(s)
- Keith Izod
- Main Group Chemistry Laboratories, School of Chemistry, Bedson Building, University of Newcastle, Newcastle upon Tyne, UK NE1 7RU.
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17
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Blug M, Grünstein D, Alcaraz G, Sabo-Etienne S, Le Goff XF, Le Floch P, Mézailles N. Bonding mode of a new bis-phosphine-borane alkyl ligand to a Rh(i) species. Chem Commun (Camb) 2009:4432-4. [DOI: 10.1039/b907813d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Boro BJ, Duesler EN, Goldberg KI, Kemp RA. An unprecedented bonding mode for potassium within a PCP-pincer palladium hydride–K-Selectride® complex. INORG CHEM COMMUN 2008. [DOI: 10.1016/j.inoche.2008.09.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Influence of aromatic ring substituents and co-ligand on the binding mode of a phosphine–borane-stabilized carbanion; crystal structures of [[(Me3Si)2{Ph2P(BH3)}C]KLn]2[Ln=(OEt2)2, pmdeta; pmdeta=N,N,N′,N″,N″-pentamethyldiethylenetriamine]. J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2007.07.040] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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