Synthesis and decay kinetics of tricarbonyldinitrogennickel (Ni(CO)3N2) in liquid krypton: approximate determination of the nickel-dinitrogen (Ni-N2) bond dissociation energy

Formation and reactivity of organometallic alkane complexes

“…allowed for systematic investigations into the electronic and steric factors affecting the stability of transition metal alkane complexes [49][50][51][52]. The reactivity of the organometallic alkane complex to ligand substitution is measured and the second order rate constant (k 2 ) for this reaction, determined by measuring the pseudo-first order rate as a function of CO concentration, can be used as a measure of the relative stability of the alkane complex, Scheme 2 [53,54].…”

Ni(N2)4 revisited: an analysis of the Ni–N2 bonding properties of this benchmark system on the basis of UV/Vis, IR and Raman spectroscopy

“…An important study in this context concerned the formation and characterisation of the molecule Ni(CO) 3 (N 2 ) in liquid Kr. 26,27 First Ni(CO) 3 was generated via UV photolysis of Ni(CO) 4 ; this then added N 2 with the formation of Ni(CO) 3 N 2 . The N 2 was slowly replaced by CO, thereby regenerating the initial Ni(CO) 4 , as well as indicating that the Ni-CO bond is stronger than the Ni-N 2 bond.…”

“…The photofragmentation can be used to form the mixed species Ni(CO) 3 (N 2 ), for which the Ni-N bond energy has been estimated by kinetic measurements in liquid Kr. 26,27 Here we report a detailed spectroscopic analysis of Ni(N 2 ) 4 , which is formed spontaneously from Ni atoms and N 2 in a solid N 2 matrix. UV/Vis, IR and Raman spectra have been recorded to provide a more detailed vibrational characterisation of the molecule than has been possible hitherto.…”

Investigation into the reactivity of M(η5-C5R5)(CO)2(alkane) (M = Mn or Re; R = H, Me or Ph; alkane = n-heptane or cyclopentane) and Re(η5-C5H5)(CO)2(Xe) in solution at cryogenic and room temperature

“…In alkane solution it is impossible to vary the solvent concentration in this way. However, such experiments have previously been performed in liquid krypton at low temperature to elucidate the reaction mechanism for the decay of Ni(CO) 3 (N 2 ), 50 and in supercritical CO 2 to probe the reactivity of W(CO) 5 (CO 2 ). 51 To analyse our data for the decay of M(η 5 -C 5 R 5 )(CO) 2 -(alkane) we have considered two extreme cases, where either k a ӷ k 1 Ј or k 1 Ј ӷ k a .…”