Crystal and molecular structure of (di-tert-butylstannylene)pyridinopentacarbonylchromium

Transition metal-tin chemistry

“…The complexes of the group 6 carbonyls have been made. 53,54 There is now one case in which a monomeric stannylene-iron complex has been reported. 21 The extremely bulky stannylene bis(2,6-di-ferf-butoxy-4methylphenyl)tin(II) was reacted with Fe2(CO)9, resulting in a trigonal-bipyramidal complex with tin in the equatorial position.…”

Synthesis, solid-state molecular structure and solution dynamics of new alkoxy stannylene-transition metal complexes

“…1: c-trigonal planar coordination geometry around tin (A) stabilised by electron-releasing or sterically demanding substituents on tin, 24,30,31,36,37 c-tetrahedron (B) or c-pentagonal bipyramid (C). [38][39][40] The mesomeric effect of lone pairs of electrons on the substituents (e.g., amides or alkoxides), dimerisation of the stannylene ligand {e.g., {[L n M] m [Sn(O t Bu)(m-O t Bu)] 2 } [ML n ¼ Ni(CO) 3 (m ¼ 1) 41 Fe(CO) 4 (4, m ¼ 2) 42 } or intramolecular base addition [43][44][45] may stabilise the Sn(II) environment. 119 Sn NMR solution spectra are sensitive probes for the chemical environment of tin nuclei in stannylenes.…”

Tuning the metal–ligand bond in theσ‐complexes of stannylenes and azabenzenes

“…The vast majority of the structures carry ligands which are either substituted azabenzenes 24–28 or polycyclic molecules possessing an azabenzene moiety 28–33 . There has been a slowly growing interest in the complexes formed by simple stannylenes and unsubstituted azabenzenes 34–43 . However, these studies exclusively address stannylene complexes bearing pyridine donor ligands.…”

“…[28][29][30][31][32][33] There has been a slowly growing interest in the complexes formed by simple stannylenes and unsubstituted azabenzenes. [34][35][36][37][38][39][40][41][42][43] However, these studies exclusively address stannylene complexes bearing pyridine donor ligands. Based on Mössbauer spectroscopy it was unraveled that one SnX 2 (X = Cl, Br) molecule and one pyridine molecule can form a stable σ-complex in solid state.…”