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Synthese und Struktur eines polyspirocyclischen Ylidkomplexes des Nickels mit vier chiralen Zentren
Author(s) -
Schmidbaur Hubert,
Mörtl Albert,
ZimmerGasser Beate
Publication year - 1981
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19811140921
Subject(s) - chemistry , ylide , methyllithium , nickel , stereochemistry , bicyclic molecule , molecule , yield (engineering) , medicinal chemistry , organic chemistry , materials science , metallurgy
Synthesis and Structure of a Polyspirocyclic Ylide complex of Nickel with four Chiral Centres The bicyclic phosphorus ylideλ 5 ‐phosphaspiro[5.5]undec‐5‐ene ( 1 ) is metalated with one equivalent of methyllithium to yield 2 , which reacts with bis (trimethylphosphane)nickel dichloride in a molar ratio of 2:1 to form the polyspirocyclic nickel ylide complex 3. X ‐ray diffraction analysis of the mononuclear complex 3 shows a centrosymmetric structure with an approximate squareplanar coordination of nickel to four chiral carbon atoms; yet the total molecule is an achiral system.