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Synthesis and Coordination Behavior of a New Hybrid Bidentate Ligand with Phosphine and Silylene Donors
Author(s) -
Nazish Mohd,
Siddiqui Mujahuddin M.,
Kumar Sarkar Samir,
Münch Annika,
Legendre Christina M.,
HerbstIrmer Regine,
Stalke Dietmar,
Roesky Herbert W.
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.202003513
Subject(s) - phosphine , chemistry , denticity , silylene , ligand (biochemistry) , chelation , dissociation (chemistry) , medicinal chemistry , crystallography , crystal structure , stereochemistry , inorganic chemistry , organic chemistry , catalysis , biochemistry , receptor , silicon
This work describes the synthesis and coordination behavior of a new mixed‐donor ligand PhC(N t Bu) 2 SiC 6 H 4 PPh 2 ( 1 ) containing both silylene and phosphine donor sites. Ligand 1 was synthesized from a reaction of ortho ‐lithiated diphenylphosphinobenzene (LiC 6 H 4 PPh 2 ) with chlorosilylene (PhC(N t Bu) 2 SiCl). Treatment of 1 with Se and GeCl 2 resulted in Si IV compounds 2 and 3 by selective oxidation of the silylene donor. This strong σ‐donor ligand induces dissociation of CuCl and PhBCl 2 leading to formation of ionic complexes 4 and 5 respectively. The reaction of 1 with ZnCl 2 and AlCl 3 resulted in the formation of chelate complexes 5 and 7 , respectively, while treatment with EtAlCl 2 and GaCl 3 forms monodentate complexes 8 and 9 . X‐ray analysis of 4 showed that the copper is in the spiro center of the two five‐membered rings. Moreover, the copper(I)chloride has not been oxidized but dissociates to Cu + and [CuCl 2 ] − . All the compounds are well characterized by mass spectrometry, elemental analysis, NMR spectroscopy, and single‐crystal X‐ray diffraction studies.