337456-24-3Relevant articles and documents
1,3,2-diazaalumina-[3]ferrocenophanes with alkyn-1-yl substituents at aluminum
Wrackmeyer, Bernd,Klimkina, Elena V.,Milius, Wolfgang
, p. 1259 - 1266 (2008/10/09)
The 1,3,2-diazaalumina-[3]ferrocenophane-ethyl(dimethyl)amine adduct 2, containing an Al-H function, reacts with terminal alkynes R-C≡C-H [R = Bu (a), tBu (b), Ph (c), SiMe3 (d)] by elimination of H 2 to the amine adducts 4a-d containing an Al-C≡C-R function. Addition of pyridine leads to the corresponding pyridine adducts 5a - d, of which the molecular structure of 5d could be determined by single crystal X-ray diffraction. The formation of 4 is accompanied by side reactions such as trimerization of the alkynes to the 1,3,5-trisubstituted benzene derivatives 6a, c, and some polymerization of the alkynes. The solution-state structures of 4 and 5 were confirmed by multinuclear magnetic resonance spectroscopy ( 1H, 13C, 27Al, 29Si NMR). Structural features and molecular dynamics were investigated by appropriate 1H/1H NOE and magnetization transfer experiments, and particular attention was paid to the correct assignment of 13C(Al-C= C-R) NMR signals.
