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Intramolecularly Double‐Donor‐Stabilized Stannylene and Its Coordination towards Ag(I) and Au(I) Centers
Author(s) -
Chibde Purva,
Raut Ravindra K.,
Kumar Vikas,
Deb Rahul,
Gonnade Rajesh,
Majumdar Moumita
Publication year - 2021
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202100523
Subject(s) - homoleptic , chemistry , ionic bonding , salt metathesis reaction , pyridine , crystallography , lithium amide , amide , crystal structure , metathesis , salt (chemistry) , metal , stereochemistry , inorganic chemistry , medicinal chemistry , ion , catalysis , organic chemistry , polymerization , enantioselective synthesis , polymer
The intramolecularly double‐donor‐stabilized stannylene 1 has been synthesized from the salt‐metathesis reaction between two equivalents of lithium pyridine ene‐amide L1 and SnCl 2 . Compound 1 exhibits dipolar behavior when reacted with B(C 6 F 5 ) 3 leading to the zwitterionic compound 2 . The reaction of 1 with one equivalent and 0.5 equivalent of AgOTf (OTf=trifluoromethane sulfonate) result in the formation of a stannylene‐AgOTf complex 3 and a homoleptic distannylene‐silver ionic complex 4 , respectively. Analogous to complex 4 , the gold(I) complex 5 has been synthesized from the reaction between two equivalents of 1 and 0.5 equivalent of AuCl.SMe 2 /Me 3 SiOTf. Complex 5 is the first example of homoleptic stannylene‐Au(I) ionic complex among the very scarce reports on stannylene‐gold(I) coordination complexes. All compounds have been structurally characterized using single crystal X‐ray crystallography. Solution‐state characterization have been performed using multinuclear NMR techniques. Detailed DFT calculations on the optimized geometries 1 o , 3 o – 5 o reveal the change in sp ‐ hybridization on the pyramidal Sn(II) center upon metal coordination and their bonding overlaps.