1
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Zimmermann L, Riesinger C, Scheer M. Potential of Mixed Dipnictogen Molybdenum Complexes in the Self-Assembly of Thallium Coordination Compounds. Inorg Chem 2024; 63:11168-11175. [PMID: 38842464 PMCID: PMC11186011 DOI: 10.1021/acs.inorgchem.4c00867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 05/15/2024] [Accepted: 05/28/2024] [Indexed: 06/07/2024]
Abstract
The coordination chemistry of the homo- and heterodipnictogen tetrahedrane complexes [{CpMo(CO)2}2(μ,η2:2-EE')] (E, E' = P, As, Sb) (A-F) toward Tl[BArF24] ([BArF24]- = [B(3,5-C6H3(CF3)2)4]-) was studied. Controlled by the used tetrahedranes A-F, and thus depending on the respective pnictogen atoms, the monomers [Tl(η2-A)][BArF24] ([A]Tl) and [Tl(η2-B)][BArF24] ([B]Tl), the double substituted [Tl(η1-C)2][BArF24] ([C]2Tl) or the even higher aggregated compounds [Tl2(η2-D)3(μ,η2:1-D)(μ,η1:1-D)][BArF24]2 ([D]5Tl2), [Tl2(η2-E)2(μ,η2:1-E)3] [BArF24]2 ([E]5Tl2) and [Tl2(η2-F)3(μ,η2:1-F)3][BArF24]2 ([F]6Tl2) were obtained. Utilization of [BArF24]- promises additional stabilization of TlI via η6-coordination of two of its aryl rings as found in compounds [A]Tl, [B]Tl and [C]2Tl. Within the series of reactivity of A-F, the heavier congeners D, E and F tend to form larger aggregates in which σ(E-E') bond contributions to the coordination behavior were observed. Interatomic distances suggest the presence of Tl···Tl interactions in [E]5Tl2 and [F]6Tl2. The features of the respective coordination compounds were studied in the solid-state as well as in solution. For the latter at least a partial dissociation of the assemblies in solution was indicated. The isolated solid-state aggregates are the first examples of heterodipnictogen units as ligands in self-assembled TlI-based coordination compounds.
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Affiliation(s)
- Lisa Zimmermann
- Institute of Inorganic Chemistry University
of Regensburg 93040 Regensburg, Germany
| | - Christoph Riesinger
- Institute of Inorganic Chemistry University
of Regensburg 93040 Regensburg, Germany
| | - Manfred Scheer
- Institute of Inorganic Chemistry University
of Regensburg 93040 Regensburg, Germany
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2
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Mondal B, Scheer M. Cu(I) Complexes Comprising tetrahedral Mo 2 E 2 or Mo 2 PE units (E=P, As, Sb) as Chelating Ligands. Chemistry 2024; 30:e202303455. [PMID: 38149717 DOI: 10.1002/chem.202303455] [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: 10/20/2023] [Revised: 12/09/2023] [Accepted: 12/26/2023] [Indexed: 12/28/2023]
Abstract
Novel isomorphous tetranuclear complexes, [(dppf)Cu(μ3 ,η2 : 2 : 2 -E2 {CpMo(CO)2 }2 ]BF4 [E=P (1), As (4), Sb (5), (dppf=1,1'-bis-(diphenylphosphino)-ferrocene)] and [(dppf)Cu(μ3 ,η2 : 2 : 2 -PE{CpMo(CO)2 }2 ]BF4 [E=As (2), Sb(3)] were synthesized from the reactions between [(dppf)Cu(MeCN)2 ][BF4 ] and tetrahedral molybdenum complexes containing unsubstituted homo- and hetero-diatomic group-15 elements [(μ,η2 : 2 -E2 {CpMo(CO)2 }2 ] [E=P (A), As (D), Sb (E)] and [(μ,η2 : 2 -PE{CpMo(CO)2 }2 ] [E=As (B), Sb (C)], respectively. In all these products, the {Mo2 E2 } or {Mo2 PE} moieties coordinate the Cu(I) center via a rare side-on η2 -coordination mode. The X-ray structure analyses of [(dppf)Cu(μ3 ,η2 : 2 : 1 -PSb{CpMo(CO)2 }2 ][BF4 ] demonstrate, for the first time, the utilization of an η1 -coordination mode for the ligand complex C to coordinate to the Cu(I) center. All the products were characterized by X-ray crystallography, NMR and IR spectroscopy, mass spectrometry and elemental analysis. Electrochemical studies also revealed the formation of 1-5, and, further, to understand the structure and bonding of the products, theoretical calculations using density functional theory (DFT) were conducted.
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Affiliation(s)
- Bijan Mondal
- Institute of Inorganic Chemistry, University of Regensburg, 93040, Regensburg, Germany
| | - Manfred Scheer
- Institute of Inorganic Chemistry, University of Regensburg, 93040, Regensburg, Germany
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3
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Gorbachuk E, Grell T, Khayarov K, Buzyurova D, Ziganshin M, Mukhametzyanov T, Lapuk S, Hey-Hawkins E, Sinyashin O, Yakhvarov D. Molybdenum-Mediated Insertion of Ketones into the P-P bond of cyclo-(P 5 Ph 5 ) and Formation of Trinuclear Molybdenum Complexes. Chempluschem 2023; 88:e202300251. [PMID: 37525541 DOI: 10.1002/cplu.202300251] [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: 05/25/2023] [Revised: 07/30/2023] [Accepted: 07/31/2023] [Indexed: 08/02/2023]
Abstract
The reaction of cyclopentaphosphine cyclo-(P5 Ph5 ) (1) with ketones (acetone and cyclooctanone) in the presence of [Mo(CO)4 (cod)] (cod=cycloocta-1,5-diene) led to air-stable trinuclear complexes in which the bis-phosphanido ligands (PPh-PPh-PPh-PPh-CMe2 O-PPh)2- (complex 2) and (PPh-PPh-PPh-PPh-C(CH2 )7 O-PPh)2- (complex 3) bridge a Mo(CO)3 -Mo(CO)3 unit. This extends the reaction of 1 with transition metal carbonyl complexes to further substrates and represents the first examples of insertion of carbonyl compounds into the P-P bond of cyclic oligophosphorus compounds. Complexes 2 and 3 have been characterized by 31 P NMR spectroscopy and single crystal X-ray diffraction. Furthermore, the thermal properties of the obtained complexes have been studied by differential scanning calorimetry (DSC) and fast scanning calorimetry (FSC).
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Affiliation(s)
- Elena Gorbachuk
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str., 8, 420088, Kazan, Russian Federation
- Alexander Butlerov Institute of Chemistry, Kazan Federal University, Kremlyovskaya str., 18, 420008, Kazan, Russian Federation
| | - Toni Grell
- Department of Chemistry, University of Milan, Via Golgi 19, 20133, Milano, Italy
| | - Khasan Khayarov
- Alexander Butlerov Institute of Chemistry, Kazan Federal University, Kremlyovskaya str., 18, 420008, Kazan, Russian Federation
| | - Daina Buzyurova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str., 8, 420088, Kazan, Russian Federation
| | - Marat Ziganshin
- Alexander Butlerov Institute of Chemistry, Kazan Federal University, Kremlyovskaya str., 18, 420008, Kazan, Russian Federation
| | - Timur Mukhametzyanov
- Alexander Butlerov Institute of Chemistry, Kazan Federal University, Kremlyovskaya str., 18, 420008, Kazan, Russian Federation
| | - Semen Lapuk
- Alexander Butlerov Institute of Chemistry, Kazan Federal University, Kremlyovskaya str., 18, 420008, Kazan, Russian Federation
| | - Evamarie Hey-Hawkins
- Leipzig University, Institute of Inorganic Chemistry, Johannisallee 29, 04103, Leipzig, Germany
| | - Oleg Sinyashin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str., 8, 420088, Kazan, Russian Federation
| | - Dmitry Yakhvarov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str., 8, 420088, Kazan, Russian Federation
- Alexander Butlerov Institute of Chemistry, Kazan Federal University, Kremlyovskaya str., 18, 420008, Kazan, Russian Federation
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4
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Shelyganov PA, Elsayed Moussa M, Seidl M, Scheer M. Diantimony Complexes [Cp R 2 Mo 2 (CO) 4 (μ,η 2 -Sb 2 )] (Cp R =C 5 H 5 , C 5 H 4 t Bu) as Unexpected Ligands Stabilizing Silver(I) n (n=1-4) Monomers, Dimers and Chains. Angew Chem Int Ed Engl 2023; 62:e202215650. [PMID: 36469453 PMCID: PMC10107263 DOI: 10.1002/anie.202215650] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 12/05/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022]
Abstract
Synthesis and reactivity of transition metal compounds bearing "naked" pnictogen atoms is an active research area with remarkable bonding patterns observed in the formed compounds. Within this field, intense investigations on the coordination behavior of complexes possessing Pn and Asn (2≤n≤5) moieties have been conducted. However, studies on heavier analogues have been ignored so far due to arduous challenges related to low yields and moderate air stability. Herein, we present the first in-depth study addressing the reactivity of organometallic complexes containing Sb-donor atoms with several AgI salts. These reactions afforded twelve unprecedented aggregates as monomers, dimers as well as three- and four-membered chains of AgI ions claimed in the literature to be inaccessible. Interatomic distances as well as computational evidence obtained with help of several different methods suggest the presence of Ag⋅⋅⋅Ag interactions in all complexes containing more than one AgI ion.
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Affiliation(s)
- Pavel A Shelyganov
- Institute of Inorganic Chemistry, University of Regensburg, 93040, Regensburg, Germany
| | - Mehdi Elsayed Moussa
- Institute of Inorganic Chemistry, University of Regensburg, 93040, Regensburg, Germany
| | - Michael Seidl
- Institute of Inorganic Chemistry, University of Regensburg, 93040, Regensburg, Germany
| | - Manfred Scheer
- Institute of Inorganic Chemistry, University of Regensburg, 93040, Regensburg, Germany
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5
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Riesinger C, Dielmann F, Szlosek R, Virovets AV, Scheer M. Synthesis and Reactivity of a Cyclooctatetraene-Like Polyphosphorus Ligand Complex [Cyclo-P 8 ]. Angew Chem Int Ed Engl 2023; 62:e202218828. [PMID: 36692270 DOI: 10.1002/anie.202218828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/23/2023] [Accepted: 01/24/2023] [Indexed: 01/25/2023]
Abstract
The thermolysis of Cp'''Ta(CO)4 with white phosphorus (P4 ) gives access to [{Cp'''Ta}2 (μ,η2 : 2 : 2 : 2 : 1 : 1 -P8 )] (A), representing the first complex containing a cyclooctatetraene-like (COT) cyclo-P8 ligand. While ring sizes of n >6 have remained elusive for cyclo-Pn structural motifs, the choice of the transition metal, co-ligand and reaction conditions allowed the isolation of A. Reactivity investigations reveal its versatile coordination behaviour as well as its redox properties. Oxidation leads to dimerization to afford [{Cp'''Ta}4 (μ4 ,η2 : 2 : 2 : 2 : 2 : 2 : 2 : 2 : 1 : 1 : 1 : 1 -P16 )][TEF]2 (4, TEF=[Al(OC{CF3 }3 )4 ]- ). Reduction, however, leads to the fission of one P-P bond in A followed by rapid dimerization to form [K@[2.2.2]cryptand]2 [{Cp'''Ta}4 (μ4 ,η2 : 2 : 2 : 2 : 2 : 2 : 2 : 2 : 1 : 1 : 1 : 1 -P16 )] (5), which features an unprecedented chain-type P16 ligand. Lastly, A serves as a P2 synthon, via ring contraction to the triple-decker complex [{Cp'''Ta}2 (μ,η6 : 6 -P6 )] (B).
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Affiliation(s)
- Christoph Riesinger
- Institute of Inorganic Chemistry, University of Regensburg, Universitätsstr. 31, 93053, Regensburg, Germany
| | - Fabian Dielmann
- Department of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 80-82, 6020, Innsbruck, Austria
| | - Robert Szlosek
- Institute of Inorganic Chemistry, University of Regensburg, Universitätsstr. 31, 93053, Regensburg, Germany
| | - Alexander V Virovets
- Institute of Inorganic Chemistry, Goethe-University Frankfurt am Main, Max-von-Laue-Straße 7, 60438, Frankfurt am Main, Germany
| | - Manfred Scheer
- Institute of Inorganic Chemistry, University of Regensburg, Universitätsstr. 31, 93053, Regensburg, Germany
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6
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Hood TM, Lau S, Webster RL. Taming PH 3: State of the Art and Future Directions in Synthesis. J Am Chem Soc 2022; 144:16684-16697. [PMID: 36070395 PMCID: PMC9501927 DOI: 10.1021/jacs.2c07688] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Appetite for reactions
involving PH3 has grown in the
past few years. This in part is due to the ability to generate PH3 cleanly and safely via digestion of cheap metal phosphides
with acids, thus avoiding pressurized cylinders and specialized equipment.
In this perspective we highlight current trends in forming new P–C/P–OC
bonds with PH3 and discuss the challenges involved with
selectivity and product separation encumbering these reactions. We
highlight the reactivity of PH3 with main group reagents,
building on the early pioneering work with transition metal complexes
and PH3. Additionally, we highlight the recent renewal
of interest in alkali metal sources of H2P– which are proving to be useful synthons for chemistry across the
periodic table. Such MPH2 sources are being used to generate
the desired products in a more controlled fashion and are allowing
access to unexplored phosphorus-containing species.
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Affiliation(s)
- Thomas M Hood
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Samantha Lau
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Ruth L Webster
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
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7
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Garbagnati A, Seidl M, Balázs G, Scheer M. Halogenation of the Hexaphosphabenzene Complex [(Cp*Mo)
2
(μ,η
6
:η
6
‐P
6
)]: Snapshots on the Reaction Progress. Chemistry 2022; 28:e202200669. [PMID: 35348263 PMCID: PMC9321898 DOI: 10.1002/chem.202200669] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Indexed: 12/16/2022]
Affiliation(s)
- Anna Garbagnati
- Institute of Inorganic Chemistry University of Regensburg 93040 Regensburg Germany
| | - Michael Seidl
- Institute of Inorganic Chemistry University of Regensburg 93040 Regensburg Germany
| | - Gábor Balázs
- Institute of Inorganic Chemistry University of Regensburg 93040 Regensburg Germany
| | - Manfred Scheer
- Institute of Inorganic Chemistry University of Regensburg 93040 Regensburg Germany
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8
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Riesinger C, Dütsch L, Scheer M. Synthesis and Redox Chemistry of a Homoleptic Iron Arsenic Prismane Cluster. Z Anorg Allg Chem 2022. [DOI: 10.1002/zaac.202200102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | - Manfred Scheer
- University of Regensburg Inorganic Chemistry Universitätsstrasse 31 D-93040 Regensburg GERMANY
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9
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Garbagnati A, Seidl M, Piesch M, Balázs G, Scheer M. Halogenation of heterobimetallic triple-decker complexes containing an E5 middle deck (E = P, As). Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Dütsch L, Riesinger C, Balázs G, Seidl M, Scheer M. Structural diversity of mixed polypnictogen complexes: dicationic E 2E' 2 (E ≠ E' = P, As, Sb, Bi) chains, cycles and cages stabilized by transition metals. Chem Sci 2021; 12:14531-14539. [PMID: 34881004 PMCID: PMC8580054 DOI: 10.1039/d1sc04924k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 10/08/2021] [Indexed: 12/26/2022] Open
Abstract
The reactivity of the tetrahedral dipnictogen complexes [{CpMo(CO)2}2(μ,η2:η2-EE′)] (E, E′ = P, As, Sb, Bi; “Mo2EE′”) towards different one-electron oxidation agents is reported. Oxidation with [Thia][TEF] (Thia+ = C12H8S2+; TEF− = Al{OC(CF3)3}4−) leads to the selective formation of the radical monocations [Mo2EE′]˙+, which immediately dimerize to the unprecedented dicationic E2E′2 ligand complexes [{CpMo(CO)2}4(μ4,η2:η2:η2:η2-E′EEE′)]2+via E–E bond formation. Single crystal X-ray diffraction revealed that, in the case of Mo2PAs and Mo2PSb, P–P bond formation occurs yielding zigzag E2P2 (E = As (1), Sb (2)) chains, whereas Mo2SbBi forms a Sb2Bi2 (5) cage, Mo2AsSb an unprecedented As2Sb2 unit representing an intermediate stage between a chain- and a cage-type structure, and Mo2AsBi a novel planar As2Bi2 (4a) cycle. Therefore, 1–5 bear the first substituent-free, dicationic hetero-E4 ligands, stabilized by transition metal fragments. Furthermore, in the case of Mo2AsSb, the exchange of the counterion causes changes in the molecular structure yielding an unusual, cyclic As2Sb2 ligand. The experimental results are corroborated by DFT calculations. Unique dicationic hetero-tetrapnictogen E2E′2 (E ≠ E′ = P, As, Sb, Bi) chains and cages are obtained via oxidation of the tetrahedranes [{CpMo(CO)2}2(μ,η2:η2-EE′)]. Exchange of the counterion causes an unusual cyclization of the As2Sb2 ligand.![]()
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Affiliation(s)
- Luis Dütsch
- Department of Inorganic Chemistry, University of Regensburg D-93040 Regensburg Germany
| | - Christoph Riesinger
- Department of Inorganic Chemistry, University of Regensburg D-93040 Regensburg Germany
| | - Gábor Balázs
- Department of Inorganic Chemistry, University of Regensburg D-93040 Regensburg Germany
| | - Michael Seidl
- Department of Inorganic Chemistry, University of Regensburg D-93040 Regensburg Germany
| | - Manfred Scheer
- Department of Inorganic Chemistry, University of Regensburg D-93040 Regensburg Germany
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11
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Tarlton ML, Fajen OJ, Kelley SP, Kerridge A, Malcomson T, Morrison TL, Shores MP, Xhani X, Walensky JR. Systematic Investigation of the Molecular and Electronic Structure of Thorium and Uranium Phosphorus and Arsenic Complexes. Inorg Chem 2021; 60:10614-10630. [DOI: 10.1021/acs.inorgchem.1c01256] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Michael L. Tarlton
- Department of Chemistry, University of Missouri, 601 S. College Avenue, Columbia 65211, Missouri, United States
| | - O. Jonathan Fajen
- Department of Chemistry, University of Missouri, 601 S. College Avenue, Columbia 65211, Missouri, United States
| | - Steven P. Kelley
- Department of Chemistry, University of Missouri, 601 S. College Avenue, Columbia 65211, Missouri, United States
| | - Andrew Kerridge
- Department of Chemistry, Lancaster University, Lancaster LA1 4YB, U.K
| | - Thomas Malcomson
- Department of Chemistry, Lancaster University, Lancaster LA1 4YB, U.K
| | - Thomas L. Morrison
- Department of Chemistry, Colorado State University, Fort Collins 80523, Colorado, United States
| | - Matthew P. Shores
- Department of Chemistry, Colorado State University, Fort Collins 80523, Colorado, United States
| | - Xhensila Xhani
- Department of Chemistry, University of Missouri, 601 S. College Avenue, Columbia 65211, Missouri, United States
| | - Justin R. Walensky
- Department of Chemistry, University of Missouri, 601 S. College Avenue, Columbia 65211, Missouri, United States
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12
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Piesch M, Reichl S, Riesinger C, Seidl M, Balazs G, Scheer M. Redox Chemistry of Heterobimetallic Polypnictogen Triple-Decker Complexes - Rearrangement, Fragmentation and Transfer. Chemistry 2021; 27:9129-9140. [PMID: 33857335 PMCID: PMC8360055 DOI: 10.1002/chem.202100844] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Indexed: 12/22/2022]
Abstract
The redox chemistry of the heterobimetallic triple‐decker complexes [(Cp*Fe)(Cp′′′Co)(μ,η5:η4‐E5)] (E=P (1), As (2), Cp*=1,2,3,4,5‐pentamethyl‐cyclopentadienyl, Cp′′′=1,2,4‐tri‐tertbutyl‐cyclopentadienyl) and [(Cp′′′Co)(Cp′′′Ni)(μ,η3:η3‐E3)] (E=P (10), As (11)) was investigated. Compound 1 and 2 could be oxidized to the monocations 3 and 4 and further to the dications 5 and 6, while the initially folded cyclo‐E5 ligand planarizes upon oxidation. The reduction leads to an opposite change in the geometry of the middle deck, which is now folded stronger into the direction of the other metal fragment (formation of monoanions 7 and 8). For the arsenic compound 8, a different behavior is found since a fragmentation into an As6 (9) and As3 ligand complex occurs. The Co and Ni triple‐decker complexes 10 and 11 can be oxidized initially to the heterometallic monocations 12 and 13, which are not stable in solution and convert selectively into the homometallic nickel complexes 14 and 15 and the cobalt complexes 16 and 17. This behavior was further proven by the oxidation of [(Cp′′′Co)(Cp′′Ni)(μ,η3:η2‐P3)] (19, Cp′′=1,3‐di‐tertbutyl‐cyclopentadienyl) comprising two different Cp ligands. The transfer of {CpRM} fragments can be suppressed when a {W(CO)5} unit is coordinated to the P3 ligand (20) prior to the oxidation and the mixed cobalt and nickel cation 21 can be isolated. The reduction of 10 and 11 yields the heterometallic monoanions 22 and 23, where no transfer of the {CpRM} fragments is observed.
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Affiliation(s)
- Martin Piesch
- Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany
| | - Stephan Reichl
- Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany
| | - Christoph Riesinger
- Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany
| | - Michael Seidl
- Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany
| | - Gabor Balazs
- Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany
| | - Manfred Scheer
- Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany
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13
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Dütsch L, Riesinger C, Balázs G, Scheer M. Synthesis of Tetrahedranes Containing the Unique Bridging Hetero-Dipnictogen Ligand EE' (E ≠ E'=P, As, Sb, Bi). Chemistry 2021; 27:8804-8810. [PMID: 33844876 PMCID: PMC8252408 DOI: 10.1002/chem.202100663] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Indexed: 11/13/2022]
Abstract
In order to improve and extend the rare class of tetrahedral mixed main group transition metal compounds, a new synthetic route for the complexes [{CpMo(CO)2}2(μ,η2:η2‐PE)] (E=As (1), Sb (2)) is described leading to higher yields and a decrease in reaction steps. Via this route, also the so far unknown heavier analogues containing AsSb (3 a), AsBi (4) and SbBi (5) ligands, respectively, are accessible. Single crystal X‐ray diffraction experiments and DFT calculations reveal that they represent very rare examples of compounds comprising covalent bonds between two different heavy pnictogen atoms, which show multiple bond character and are stabilised without any organic substituents. A simple one‐pot reaction of [CpMo(CO)2]2 with ME(SiMe3)2 (M=Li, K; E=P, As, Sb, Bi) and the subsequent addition of PCl3, AsCl3, SbCl3 or BiCl3, respectively, give the complexes 1–5. This synthesis is also transferable to the already known homo‐dipnictogen complexes [{CpMo(CO)2}2(μ,η2:η2‐E2)] (E=P, As, Sb, Bi) resulting in higher yields comparable to those in the literature reported procedures and allows the introduction of the bulkier and better soluble Cp′ (Cp′=tert butylcyclopentadienyl) ligand.
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Affiliation(s)
- Luis Dütsch
- Institute of Inorganic Chemistry, University of Regensburg, 93040, Regensburg, Germany
| | - Christoph Riesinger
- Institute of Inorganic Chemistry, University of Regensburg, 93040, Regensburg, Germany
| | - Gábor Balázs
- Institute of Inorganic Chemistry, University of Regensburg, 93040, Regensburg, Germany
| | - Manfred Scheer
- Institute of Inorganic Chemistry, University of Regensburg, 93040, Regensburg, Germany
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14
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Abstract
A systematic study of diverse halogenation reactions of the tetrahedral Mo2P2 ligand complex [{CpMo(CO)2}2(μ,η2:η2-P2)] (1) is reported. By reacting 1 with different halogenating agents, a series of complexes such as [(CpMo)4(μ4-P)(μ3-PI)2(μ-I)(I)3(I3)] (2), [{CpMo(CO)2}2(μ-PBr2)2] (3a), [{CpMo(CO)2}(CpMoBr2)(μ-PBr2)2] (4a), [{CpMo(CO)2}2(μ-PCl2)2] (3b), and [{CpMo(CO)2}(CpMoCl2)(μ-PCl2)2] (4b) were obtained. Whereas the reaction of 1 toward various bromine and chlorine sources leads to similar results, a different behavior is observed in the reaction with iodine in which 2 is formed. The products were comprehensively characterized by spectroscopic methods and single crystal X-ray diffraction, and the electronic structures of 2, 3a, and 4a were elucidated by DFT calculations.
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Affiliation(s)
- Anna Garbagnati
- Institute of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Michael Seidl
- Institute of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Gábor Balázs
- Institute of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Manfred Scheer
- Institute of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
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15
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Fontana N, Espinosa‐Jalapa NA, Seidl M, Bauer JO. Easy Access to Enantiomerically Pure Heterocyclic Silicon-Chiral Phosphonium Cations and the Matched/Mismatched Case of Dihydrogen Release. Chemistry 2021; 27:2649-2653. [PMID: 33264430 PMCID: PMC7898527 DOI: 10.1002/chem.202005171] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Indexed: 11/17/2022]
Abstract
Phosphonium ions are widely used in preparative organic synthesis and catalysis. The provision of new types of cations that contain both functional and chiral information is a major synthetic challenge and can open up new horizons in asymmetric cation-directed and Lewis acid catalysis. We discovered an efficient methodology towards new Si-chiral four-membered CPSSi* heterocyclic cations. Three synthetic approaches are presented. The stereochemical sequence of anchimerically assisted cation formation with B(C6 F5 )3 and subsequent hydride addition was fully elucidated and proceeds with excellent preservation of the chiral information at the stereogenic silicon atom. Also the mechanism of dihydrogen release from a protonated hydrosilane was studied in detail by the help of Si-centered chirality as stereochemical probe. Chemoselectivity switch (dihydrogen release vs. protodesilylation) can easily be achieved through slight modifications of the solvent. A matched/mismatched case was identified and the intermolecularity of this reaction supported by spectroscopic, kinetic, deuterium-labeling experiments, and quantum chemical calculations.
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Affiliation(s)
- Nicolò Fontana
- Institut für Anorganische ChemieFakultät für Chemie und PharmazieUniversität RegensburgUniversitätsstraße 3193053RegensburgGermany
| | - Noel Angel Espinosa‐Jalapa
- Institut für Anorganische ChemieFakultät für Chemie und PharmazieUniversität RegensburgUniversitätsstraße 3193053RegensburgGermany
| | - Michael Seidl
- Institut für Anorganische ChemieFakultät für Chemie und PharmazieUniversität RegensburgUniversitätsstraße 3193053RegensburgGermany
| | - Jonathan O. Bauer
- Institut für Anorganische ChemieFakultät für Chemie und PharmazieUniversität RegensburgUniversitätsstraße 3193053RegensburgGermany
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16
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Riesinger C, Dütsch L, Balázs G, Bodensteiner M, Scheer M. Cationic Functionalisation by Phosphenium Ion Insertion. Chemistry 2020; 26:17165-17170. [PMID: 32996637 PMCID: PMC7839539 DOI: 10.1002/chem.202003291] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 09/21/2020] [Indexed: 12/12/2022]
Abstract
The reaction of [Cp'''Ni(η3 -P3 )] (1) with in situ generated phosphenium ions [RR'P]+ yields the unprecedented polyphosphorus cations of the type [Cp'''Ni(η3 -P4 R2 )][X] (R=Ph (2 a), Mes (2 b), Cy (2 c), 2,2'-biphen (2 d), Me (2 e); [X]- =[OTf]- , [SbF6 ]- , [GaCl4 ]- , [BArF ]- , [TEF]- ) and [Cp'''Ni(η3 -P4 RCl)][TEF] (R=Ph (2 f), tBu (2 g)). In the reaction of 1 with [Br2 P]+ , an analogous compound is observed only as an intermediate and the final product is an unexpected dinuclear complex [{Cp'''Ni}2 (μ,η3 :η1 :η1 -P4 Br3 )][TEF] (3 a). A similar product [{Cp'''Ni}2 (μ,η3 :η1 :η1 -P4 (2,2'-biphen)Cl)][GaCl4 ] (3 b) is obtained, when 2 d[GaCl4 ] is kept in solution for prolonged times. Although the central structural motif of 2 a-g consists of a "butterfly-like" folded P4 ring attached to a {Cp'''Ni} fragment, the structures of 3 a and 3 b exhibit a unique asymmetrically substituted and distorted P4 chain stabilised by two {Cp'''Ni} fragments. Additional DFT calculations shed light on the reaction pathway for the formation of 2 a-2 g and the bonding situation in 3 a.
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Affiliation(s)
- Christoph Riesinger
- Institute of Inorganic ChemistryUniversity of Regensburg93040RegensburgGermany
| | - Luis Dütsch
- Institute of Inorganic ChemistryUniversity of Regensburg93040RegensburgGermany
| | - Gábor Balázs
- Institute of Inorganic ChemistryUniversity of Regensburg93040RegensburgGermany
| | | | - Manfred Scheer
- Institute of Inorganic ChemistryUniversity of Regensburg93040RegensburgGermany
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17
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Riley RD, Dickie DA, Land MA, Kemp RA, Macdonald CLB, Werner-Zwanziger U, Robertson KN, Clyburne JAC. Heavy Metals Make a Chain: A Catenated Bismuth Compound. Chemistry 2020; 26:7711-7719. [PMID: 32298506 DOI: 10.1002/chem.202001295] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 04/09/2020] [Indexed: 01/20/2023]
Abstract
Catenation is common for the light main-group elements whereas it is rare for the heavy elements. Herein, we report the first example of a neutral molecule containing a Bi4 chain. It is prepared in a one-step reaction between bismuth trichloride and bis(diisopropylphosphino)amine in methanol suspension. The same reaction carried out in dichloromethane gives quite different products. All products have been characterized spectroscopically and using single-crystal X-ray analysis.
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Affiliation(s)
- Robert D Riley
- Department of Chemistry, Saint Mary's University, Halifax, Nova Scotia, B3H 3C3, Canada
| | - Diane A Dickie
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico, 87131, USA.,Current address: Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
| | - Michael A Land
- Department of Chemistry, Saint Mary's University, Halifax, Nova Scotia, B3H 3C3, Canada
| | - Richard A Kemp
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico, 87131, USA
| | - Charles L B Macdonald
- Carleton University, 203 Steacie Building, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
| | - Ulrike Werner-Zwanziger
- Department of Chemistry, Clean Technologies Research Institute, NMR-3, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada
| | - Katherine N Robertson
- Department of Chemistry, Saint Mary's University, Halifax, Nova Scotia, B3H 3C3, Canada
| | - Jason A C Clyburne
- Department of Chemistry, Saint Mary's University, Halifax, Nova Scotia, B3H 3C3, Canada
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18
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Piesch M, Graßl C, Scheer M. Element-Element Bond Formation upon Oxidation and Reduction. Angew Chem Int Ed Engl 2020; 59:7154-7160. [PMID: 32017349 PMCID: PMC7216884 DOI: 10.1002/anie.201916622] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 01/28/2020] [Indexed: 11/26/2022]
Abstract
The redox chemistry of [(Cp′′′Co)2(μ,η2:η2‐E2)2] (E=P (1), As (2); Cp′′′=1,2,4‐tri(tert‐butyl)cyclopentadienyl) was investigated. Both compounds can be oxidized and reduced twice. That way, the monocations [(Cp′′′Co)2(μ,η4:η4‐E4)][X] (E=P, X=BF4 (3 a), [FAl] (3 b); E=As, X=BF4 (4 a), [FAl] (4 b)), the dications [(Cp′′′Co)2(μ,η4:η4‐E4)][TEF]2 (E=P (5), As (6)), and the monoanions [K(18‐c‐6)(dme)2][(Cp′′′Co)2(μ,η4:η4‐E4)] (E=P (7), As (8)) were isolated. Further reduction of 7 leads to the dianionic complex [K(18‐c‐6)(dme)2][K(18‐c‐6)][(Cp′′′Co)2(μ,η3:η3‐P4)] (9), in which the cyclo‐P4 ligand has rearranged to a chain‐like P4 ligand. Further reduction of 8 can be achieved with an excess of potassium under the formation of [K(dme)4][(Cp′′′Co)2(μ,η3:η3‐As3)] (10) and the elimination of an As1 unit. Compound 10 represents the first example of an allylic As3 ligand incorporated into a triple‐decker complex.
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Affiliation(s)
- Martin Piesch
- Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany
| | - Christian Graßl
- Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany
| | - Manfred Scheer
- Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany
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19
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Piesch M, Graßl C, Scheer M. Element‐Element‐Bindungsbildung durch Oxidation und Reduktion. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916622] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Martin Piesch
- Institut für Anorganische Chemie Universität Regensburg 93040 Regensburg Deutschland
| | - Christian Graßl
- Institut für Anorganische Chemie Universität Regensburg 93040 Regensburg Deutschland
| | - Manfred Scheer
- Institut für Anorganische Chemie Universität Regensburg 93040 Regensburg Deutschland
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20
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Riedlberger F, Seidl M, Scheer M. The reaction behavior of [Cp2Mo2(CO)4(μ,η2:2-P2)] and [Cp′′Ta(CO)2(η4-P4)] towards hydroxide and tert-butyl nucleophiles. Chem Commun (Camb) 2020; 56:13836-13839. [DOI: 10.1039/d0cc06150f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The reaction behavior of [Cp2Mo2(CO)4(μ,η2:2-P2)] (1) and [Cp′′Ta(CO)2(η4-P4)] (2), respectively, towards the anions OH− and tBu− are reported, which leads to a selective functionalisation of one P atom.
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Affiliation(s)
- Felix Riedlberger
- Institut für Anorganische Chemie
- Universität Regensburg
- 93040 Regensburg
- Germany
| | - Michael Seidl
- Institut für Anorganische Chemie
- Universität Regensburg
- 93040 Regensburg
- Germany
| | - Manfred Scheer
- Institut für Anorganische Chemie
- Universität Regensburg
- 93040 Regensburg
- Germany
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