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Synthesis of Heavy N‐ Heterocyclic Tetrylenes: Influence of Ligand Sterics on Structure
Author(s) -
Schwamm Ryan J.,
Randow Clara A.,
Mouchfiq Ahmed,
Evans Matthew J.,
Coles Martyn P.,
Robin Fulton J.
Publication year - 2021
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202100447
Subject(s) - chemistry , monomer , tin , steric effects , germanium , solid state , crystallography , ligand (biochemistry) , stereochemistry , medicinal chemistry , silicon , organic chemistry , receptor , biochemistry , polymer
The synthesis and structural characterisation of [(NON R )M] (NON=O(SiMe 2 NR) 2 ] 2− ; R= t Bu, Ph, 2,6‐Me 2 C 6 H 3 (Dmp), 2,6‐ i Pr 2 C 6 H 3 (Dipp); M=Ge, Sn, Pb) is described. Germanium complexes [(NON Ph )Ge], [(NON Dmp )Ge] and [(NON Dipp )Ge] are monomeric. Tin complexes [(NON Ph )Sn] 2 , [(NON Dmp )Sn] 2 and [(NON t Bu )Sn] 2 are dimeric in the solid‐state, with [(NON Ph )Sn] 2 forming a link through bridging N‐atoms, [(NON Dmp )Sn] 2 linked through Sn⋅⋅⋅Ar contacts and [(NON t Bu )Sn] 2 forming the first distannene bearing two amido ligands. In contrast, [(NON Dipp )Sn] is monomeric in the solid‐state. The lead complexes [(NON Ph )Pb] 2 and [(NON Dmp )Pb] 2 are isostructual with their tin analogues while [(NON t Bu )Pb] is monomeric in the solid‐state. Solution phase NMR spectroscopic data suggest that all [(NON R )M] compounds are monomeric in solution. Structural parameters, including buried volume (%V bur ) are discussed.