trans,trans,trans-(1,5,9 Cyclododecatriene)nickel(0) a
organonickel compound with the formula NiC12H18, better known as t-Ni(cdt). It is a 16-electron
coordination complex featuring trigonal planar
nickel (0) bound to the three
alkene groups in the
cyclododecatrieneligand.[1]X-ray structural analysis demonstrates that the three olefins adopt a propeller-like arrangement around the nickel atom center, making the structure
chiral.[2] This extremely air-sensitive deep red solid was the first discovered Ni(0)-olefin complex.[3]
The all-trans-(cdt) ligand has been shown to be easily displaced with olefins such as trans-
cyclooctene,[3]ethylene,[6] all-cis-(cdt),[7]norbornene,[6][8] to give the corresponding colorless 16-electron Ni(0)-olefin complexes with coplanar geometry.
Ni(cod)2 can also be easily prepared from Ni(cdt).
Formation of other 16-electron Ni(0)-olefin complexes from t-Ni(cdt)
Recently, it was demonstrated that t-Ni(cdt) can be used to synthesize unique air-stable 16-electron Ni(0)–olefin complexes, such as Ni(Fstb)3 and Ni(4-tBustb)3 using (E)-
stilbene ligands.[9][10]
^Brauer, D. J.; Krüger, C. (1972). "The three-dimensional structure of trans.trans,trans-1,5,9-cyclododecatrienenickel". Journal of Organometallic Chemistry. 44 (2): 397–402.
doi:
10.1016/S0022-328X(00)82929-0.
^
abcWilke, G. (1988). "Contributions to Organo-Nickel Chemistry". Angewandte Chemie International Edition. 27 (1): 185–206.
doi:
10.1002/anie.198801851.
^Bogdanović, B.; Kröner, M.; Wilke, G. (1966). "Übergangsmetallkomplexe, I. Olefin-Komplexe des Nickels(0)". Justus Liebigs Annalen der Chemie. 699 (1): 1–23.
doi:
10.1002/jlac.19666990102.
PMID5986842.