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Synthesis of Tetrahedranes Containing the Unique Bridging Hetero‐Dipnictogen Ligand EE′ (E ≠ E′=P, As, Sb, Bi)
Author(s) -
Dütsch Luis,
Riesinger Christoph,
Balázs Gábor,
Scheer Manfred
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202100663
Subject(s) - pnictogen , chemistry , bismuth , covalent bond , ligand (biochemistry) , crystallography , stereochemistry , bridging ligand , single crystal , transition metal , crystal structure , catalysis , organic chemistry , physics , receptor , biochemistry , superconductivity , quantum mechanics
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,η 2 :η 2 ‐ 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(SiMe 3 ) 2 (M=Li, K; E=P, As, Sb, Bi) and the subsequent addition of PCl 3 , AsCl 3 , SbCl 3 or BiCl 3 , respectively, give the complexes 1–5 . This synthesis is also transferable to the already known homo‐dipnictogen complexes [{CpMo(CO) 2 } 2 (μ,η 2 :η 2 ‐ E 2 )] (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.