Premium
Synthesis of a Novel Lithocene that has Aromatic‐Like Nature with Nonaromatic Rings
Author(s) -
Saito Masaichi,
Kuwabara Takuya,
Ishimura Kazuya,
Nagase Shigeru
Publication year - 2011
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.201100619
Subject(s) - cyclopentadienyl complex , aromaticity , recrystallization (geology) , chemistry , stereochemistry , organic chemistry , molecule , biology , catalysis , paleontology
Recrystallization of 1,2‐dilithiobistannole 1 with [12]‐crown‐4 afforded novel lithocene 2 , which is the first metallocene in which the two cyclopentadienyl (Cp)‐like ligands are directly bonded without any bridging group. The high‐field 7 Li resonance and negative NICS(1) value suggest considerable aromatic character of 2 , while the stannole rings are nonaromatic with CC bond alternation (see scheme).