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Dinuclear Organotin Building Blocks and their Conversion into a Tetranuclear Macrocycle Containing Sn−O−Sn Linkages
Author(s) -
GómezJaimes Gelen,
Rojas León Irán,
Martínez Romero Rodolfo,
Beltrán Hiram I.,
RodríguezMolina Braulio,
Hiller Wolf,
Jurkschat Klaus,
Hernández Irán F.,
Höpfl Herbert
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.202100186
Subject(s) - chemistry , biphenyl , crystallography , stoichiometry , biphenylene , ring (chemistry) , tin , stereochemistry , crystal structure , polymer , organic chemistry , phenylene
Six dinuclear organotin building blocks of general composition RR′R′′SnCH 2 Si(CH 3 ) 2 −biphenyl−Si(CH 3 ) 2 CH 2 SnR′′R′R, in which the tin atoms are separated by a p,p ′‐biphenylene bridge and carry different substituents [ BD1 with R, R′=CH 2 Si(CH 3 ) 3 , R′′=Ph; BD2 with R, R′=CH 2 Si(CH 3 ) 3 , R′′=Cl; BD3 , with R, R′=CH 2 Si(CH 3 ) 3 , R′′=I; BD4 with R=CH 2 Si(CH 3 ) 2 (C 5 H 4 FeCp), R′, R′′=Ph; BD5 with R=CH 2 Si(CH 3 ) 2 (C 5 H 4 FeCp), R′=Ph, R”=Cl; BD6 with R=CH 2 Si(CH 3 ) 2 (C 5 H 4 FeCp ) , R′=Ph, R′′=I], were synthesized and characterized by spectroscopic and spectrometric methods. Furthermore, the crystal and molecular structures of BD2 were determined by single‐crystal X‐ray diffraction (SCXRD) analysis, revealing the formation of molecular strands through intermolecular Cl→Sn contacts. The 1D coordination polymer [ BD2 ] n comprises macrocyclic rings of composition [ BD2 ] 2 that motivated the generation of a related molecular macrocyclic structure by reaction of BD2 with silver (I) oxide in a 2 : 2 stoichiometry. The [2+2] macrocyclization yielded the 30‐membered tetra‐nuclear ring structure M1 , viz ., {[R 2 SnCH 2 Si(CH 3 ) 2 −biphenyl−(CH 3 ) 2 SiCH 2 SnR 2 ]( μ‐ O)} 2 , in which two BD2 dinuclear building blocks are linked through two covalent Sn−O−Sn moieties. Examination by DFT calculations at the B3LYP/def2svp and B3LYP/6‐31G*(C,H,O,Si)/LanL2DZ(Sn) levels of theory gave energy minima for molecular conformers of M1 carrying the Sn−O−Sn and p,p ′‐biphenylene bridges in syn ‐ or anti ‐orientation.