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Boryl‐ and Silyl‐Substituted Mixed Sandwich Compounds of Scandium
Author(s) -
Braunschweig Holger,
Damme Alexander,
Dück Klaus,
Krummenacher Ivo,
Paprocki Valerie,
Radacki Krzysztof,
Ramler Jacqueline,
Schiller Carl,
Schneider Christoph
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201704908
Subject(s) - silylation , scandium , tetrahydrofuran , chemistry , cyclopentadienyl complex , ligand (biochemistry) , electrochemistry , medicinal chemistry , crystallography , polymer chemistry , organic chemistry , catalysis , electrode , biochemistry , receptor , solvent
An improved, one‐pot synthesis of the linear sandwich compound [Sc( η 5 ‐C 5 H 5 )( η 8 ‐C 8 H 8 )] is presented. The synthetic procedure is amenable to boryl‐ and silyl‐substituted cyclopentadienyl and cyclooctatetraenyl ligands, thereby yielding the first functionalized derivatives. We found that the synthesis of the silyl‐substituted mixed sandwich complexes produces higher yields when the ligand exchange is carried out stepwise, by isolating the intermediate trimethylsilylated half‐sandwich complex [Sc( η 8 ‐C 8 H 7 SiMe 3 )Cl(THF)] (THF=tetrahydrofuran). The molecular structures of the parent complex, as well as of its mono‐boryl‐substituted derivatives, have been determined by single‐crystal X‐ray diffraction. In addition, the optical and electrochemical properties of the mixed sandwich complexes are reported.