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Borane Insertion into Group‐4 Metal‐to‐Carbon Bonds: The Reaction of HB(C 6 F 5 ) 2 with (η 2 ‐Formaldehyde)zirconocene Dimer and with (Butadiene)zirconocene
Author(s) -
Blaschke Ulrich,
Erker Gerhard,
Fröhlich Roland,
Meyer Oliver
Publication year - 1999
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/(sici)1099-0682(199912)1999:12<2243::aid-ejic2243>3.0.co;2-0
Subject(s) - chemistry , borane , metallacycle , dimer , zirconium , metal , crystal structure , crystallography , formaldehyde , insertion reaction , medicinal chemistry , stereochemistry , x ray crystallography , inorganic chemistry , organic chemistry , catalysis , physics , diffraction , optics
(η 2 ‐Formaldehyde)zirconocene dimer ( 8 ) cleanly adds one or two molar equivalents of the borane HB(C 6 F 5 ) 2 by insertion of the H–[B] unit into the zirconium–carbon bond of the metallaoxirane moieties to form the mono‐ and bis‐insertion products 16 and 17 , respectively. These systems contain five‐membered heterocyclic rings that are built up by connecting five different elements, namely H, B, C, O, and Zr. The bis(borane) insertion product 17 was characterized by an X‐ray crystal structure analysis. (Butadiene)zirconocene reacts with HB(C 6 F 5 ) 2 in a similar way by insertion of the H–[B] unit into the (butadiene)C4–Zr linkage to form the metallacycle 18 .