186703-54-8Relevant academic research and scientific papers
New sterically encumbered arylimido hexamolybdates for organic oxidation reactions
Jangir, Ritambhara,Antony, Rajendran,Murugavel, Ramaswamy
, p. 1004 - 1013 (2016)
Facile synthesis of mono- and di-functionalised arylimido hexamolybdates, (nBu4N)2[Mo6O18(L1)] (1), (nBu4N)2[Mo6O17(L1)2] (2) and (nBu4N)2[Mo6O18(L2)] (3) (L1 = 4-bromo-2,6-diisopropylaniline, L2 = 2,2′,6,6′-tetraisopropylbenzidine), has been achieved through the reaction of parent (nBu4N)2[Mo6O19] (4) with a series of aniline derivatives. The arylimido derivatives 1-3 have been characterised by both analytical and spectroscopic studies (1H NMR, IR, UV-Vis and mass spectral studies), apart from structural elucidation of all the three compounds by single crystal X-ray diffraction studies. Steric hindrance at the ortho-positions of the arylamine seems to strengthen and effectively protect the newly formed MoN bonds. The surface modification of the hexamolybdate by aryl amines results in the transformation of otherwise inactive parent compound 4 into useful catalysts 1-3, which effectively catalyse the oxidation of cyclohexene to cyclohexene epoxide and benzyl alcohol to benzaldehyde and benzoic acid.
TRANSITION METAL COMPOUNDS FOR OLEFIN POLYMERIZATION AND OLIGOMERIZATION
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Page/Page column 106-107, (2010/02/15)
This invention relates to new transition metal catalyst compounds represented by the formula (I): where: M and M' are, independently, a group 8, 9, 10 or 11 transition metal, preferably Ni, Co, Pd, Cu or Fe; each R group is, independently, is, hydrogen, or a hydrocarbyl, substituted hydrocarbyl, halocarbyl, substituted halocarbyl, silylcarbyl, substituted silylcarbyl, germylcarbyl, or substituted germylcarbyl substituents, and optionally, adjacent R groups may join together to form a substituted or unsubstituted, saturated, partially unsaturated, or aromatic cyclic or polycyclic substituent; R' is hydrogen, or a hydrocarbyl, substituted hydrocarbyl, halocarbyl, substituted halocarbyl, silylcarbyl, substituted silylcarbyl, germylcarbyl, or substituted germylcarbyl substituents, and optionally, adjacent R groups may join together with R' to form a substituted or unsubstituted, saturated, partially unsaturated, or aromatic cyclic or polycyclic substituent; each X group is, independently, is, hydrogen, a halogen, or a hydrocarbyl, substituted hydrocarbyl, halocarbyl, substituted halocarbyl, silylcarbyl, substituted sililcarbyl, germylcarbyl, or substituted germylcarbyl substituents, and optionally, adjacent X groups may join together to form a substituted or unsubstituted, saturated, partially unsaturated, or aromatic cyclic or polycyclic substituent; m and m’ are, independently, 0, 1, 2, or 3; z and z’ are, independently, 0, 1, 2, or 3; N is nitrogen; Q is hydrogen, or a hydrocarbyl, substituted hydrocarbyl, halocarbyl, substituted halocarbyl, silylcarbyl, substituted silylcarbyl, germylcarbyl, or substituted germylcarbyl substituents; Q’ is hydrogen, or a hydrocarbyl, substituted hydrocarbyl, halocarbyl, substituted halocarbyl, silylcarbyl, substituted silylcarbyl, germylcarbyl or substituted germylcarbyl substituents; and L is a hydrocarbyl, substituted hydrocarbyl, halocarbyl, substituted halocarbyl, silylcarbyl, substituted silylcarbyl, germylcarbyl, or substituted germylcarbyl substituent.
