Phosphine/Sulfoxide-Supported Carbon(0) Complex

Diversification of the Carbodicarbene Class by Embedding an Anionic Component in its Scaffold

Carbodicarbene (CDC) has become an emerging ligand in many fields due to its strong σ-donating ability. Collapse

Key Words

• Anionic carbodicarbene
• carbone
• dative bonding model
• geminal bimetallic complexes

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MESH Headings Collapse

Grants

• NSTC 112-2123-M-001-007 National Science Council
• AS-GC-111-M04 Academia Sinica

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Affiliation(s)

Cheng-Han Yu Institute of chemistry, Academia Sinica, Taipei, Taiwan (R.O.C., 115201
Ka-Chun Au-Yeung Institute of chemistry, Academia Sinica, Taipei, Taiwan (R.O.C., 115201 Corporate R&D Center, LCY Chemical Corporation, Kaohsiung, Taiwan (R.O.C
Ruiqin Liu School of Chemistry and Molecular Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, China
Chao-Hsien Lee Institute of chemistry, Academia Sinica, Taipei, Taiwan (R.O.C., 115201
Dandan Jiang School of Chemistry and Molecular Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, China
Bamlaku Semagne Aweke Institute of chemistry, Academia Sinica, Taipei, Taiwan (R.O.C., 115201 Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu, Taiwan (R.O.C Sustainable Chemical Science and Technology, Taiwan International Graduate Program, Academia Sinica, Taipei, Taiwan (R.O.C
Chia-Hung Wu Institute of chemistry, Academia Sinica, Taipei, Taiwan (R.O.C., 115201 Department of Chemistry, National Taiwan University, Taipei, Taiwan (R.O.C
Yu-Jou Wang Institute of chemistry, Academia Sinica, Taipei, Taiwan (R.O.C., 115201 Department of Chemistry, National Taiwan University, Taipei, Taiwan (R.O.C
Ting-Hsuan Wang Institute of chemistry, Academia Sinica, Taipei, Taiwan (R.O.C., 115201
Kien Voon Kong Department of Chemistry, National Taiwan University, Taipei, Taiwan (R.O.C
Glenn P A Yap Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware, United States
Wen-Ching Chen Institute of chemistry, Academia Sinica, Taipei, Taiwan (R.O.C., 115201
Gernot Frenking School of Chemistry and Molecular Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, China Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, D-35043, Marburg, Germany
Lili Zhao School of Chemistry and Molecular Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, China
Tiow-Gan Ong Institute of chemistry, Academia Sinica, Taipei, Taiwan (R.O.C., 115201 Department of Chemistry, National Taiwan University, Taipei, Taiwan (R.O.C Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung, Taiwan (R.O.C

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New Insight into the Reactivity of S,S-Bis-ylide

The present work focuses on the reactivity of S,S-bis-ylide 2, which presents a strong nucleophilic character, as evidenced by reactions with methyl iodide and CO₂, affording C-methylated salts 3 and betaine 4, respectively. The derivatization of betaine 4 affords the corresponding ester derivative 6, which is fully characterized by using NMR spectroscopy and X-ray diffraction analysis. Furthermore, an original reaction with phosphenium ions leads to the formation of a transient push-pull phosphino(sulfonio)carbene 8, which rearranges to give stabilized sulfonium ylide derivative 7.

Carbodicarbenes and Striking Redox Transitions of their Conjugate Acids: Influence of NHC versus CAAC as Donor Substituents

Herein, a new type of carbodicarbene (CDC) comprising two different classes of carbenes is reported; NHC and CAAC as donor substituents and compare the molecular structure and coordination to Au(I)Cl to those of NHC-only and CAAC-only analogues. The conjugate acids of these three CDCs exhibit notable redox properties. Their reactions with [NO][SbF₆ ] were investigated. The reduction of the conjugate acid of CAAC-only based CDC with KC₈ results in the formation of hydrogen abstracted/eliminated products, which proceed through a neutral radical intermediate, detected by EPR spectroscopy. In contrast, the reduction of conjugate acids of NHC-only and NHC/CAAC based CDCs led to intermolecular reductive (reversible) carbon-carbon sigma bond formation. The resulting relatively elongated carbon-carbon sigma bonds were found to be readily oxidized. They were, thus, demonstrated to be potent reducing agents, underlining their potential utility as organic electron donors and n-dopants in organic semiconductor molecules.

Complexes of Dichlorogermylene with Phosphine/Sulfoxide-Supported Carbone as Ligand

Due to their remarkable electronic features, recent years have witnessed the emergence of carbones L₂C, which consist in two donating L ligands coordinating a central carbon atom bearing two lone pairs. In this context, the phosphine/sulfoxide-supported carbone 4 exhibits a strong nucleophilic character, and here, we describe its ability to coordinate dichlorogermylene. Two original stable coordination complexes were obtained and fully characterized in solution and in the solid state by NMR spectroscopy and X-ray diffraction analysis, respectively. At 60 °C, in the presence of 4, the Ge(II)-complex 5 undergoes a slow isomerization that transforms the bis-ylide ligand into an yldiide.

Carbodicarbene: geminal-Bimetallic Coordination in Selective Manner

The reaction of Pd(OAc)₂ with free carbodicarbene (CDC) generates a Pd acetate trinuclear complex 1 via intramolecular C(sp³ )-H bond activation at one of the CDC methyl side arms. The solid structure of 1 reveals the capability of CDC to facilitate a double dative bond with two palladium centers in geminal fashion. This is attributed to the chelating mode of CDC, which can frustrate π-conjugation within the CDC framework. Such effect maybe also amplified by ligand-ligand interaction. The formation of other gem-bimetallic Pd-Pd, Pd-Au, and Ni-Au provides further structural evidence for this proof-of-concept in selective installation. Structural analysis is supported by computational calculations based on state-of-the-art energy decomposition analysis (EDA) in conjunction with natural orbitals for chemical valence (NOCV) method.

Geminal Dianions Stabilized by Main Group Elements

This review is dedicated to the chemistry of stable and isolable species that bear two lone pairs at the same C center, i.e., geminal dianions, stabilized by main group elements. Three cases can thus be considered: the geminal-dilithio derivative, for which the two substituents at C are neutral, the yldiide derivatives, for which one substituent is neutral while the other is charged, and finally the geminal bisylides, for which the two substituents are positively charged. In this review, the syntheses and electronic structures of the geminal dianions are presented, followed by the studies dedicated to their reactivity toward organic substrates and finally to their coordination chemistry and applications.