A method of forming a thin film on a substrate which includes a step of contacting a surface with a precursor compound having a transition metal and one or more alkyl-1,3-diazabutadiene ligands is provided. The resulting modified surface is then contacted with an activating compound.

The invention relates to oligomerization of olefins, such as ethylene, to higher olefins, such as a mixture of 1-hexene and 1-octene, using a catalyst system that comprises a) a source of chromium b) one or more activators and c) a phosphacycle-containing ligating compound. Additionally, the invention relates to a phosphacycle-containing ligating compound and a process for making said compound.

The invention relates to oligomerization of olefins, such as ethylene, to higher olefins, such as a mixture of 1-hexene and 1-octene, using a catalyst system that comprises a) a source of chromium b) one or more activators and c) a phosphacycle-containing ligating compound. Additionally, the invention relates to a phosphacycle-containing ligating compound and a process for making said compound.

The present invention relates to a ligand compound, a catalyst system for oligomerization of olefins including the ligand compound and the organic chromium compound, and a method for oligomerizing olefins using the same. The catalyst system for olefin oligomerization according to the present invention invention exhibits high selectivity to 1-hexene or 1-octene while having excellent catalytic activity, thereby enabling more efficient production of alpha-olefins.

The invention relates to a two-stage synthesis for the production of bis(tertbutylimido)bis(dialkylamido)tungsten compounds according to the general formula [W(NtBu).sub.2(NR.sup.AR.sup.B).sub.2] (I), starting from [W(NtBu).sub.2(NHtBu).sub.2]. The invention also relates to compounds according to the general formula [W(NtBu).sub.2(NR.sup.AR.sup.B).sub.2] (I), obtainable according to the claimed method, compounds according to general formula [W(NtBu).sub.2(NR.sup.AR.sup.B).sub.2] (I), with the exception of [W(NtBu).sub.2(NMe.sub.2).sub.2] and [W(NtBu).sub.2(NEtMe).sub.2], the use of a compound [W(NtBu).sub.2(NR.sup.AR.sup.B).sub.2] (I), and a substrate which, on a surface, has a tungsten layer or a tungsten-containing layer. Defined bis(tertbutylimido)bis(dialkylamido)tungsten compounds of the type [W(NtBu).sub.2(NR.sup.AR.sup.B).sub.2] (I) can be produced easily, economically and reproducibly in high purity and good yields by means of the described method. On account of their high purity, the compounds are suitable for producing high-quality substrates which have tungsten layers or tungsten-containing layers.

The invention relates to a two-stage synthesis for the production of bis(tertbutylimido)bis(dialkylamido)tungsten compounds according to the general formula [W(NtBu).sub.2(NR.sup.AR.sup.B).sub.2] (I), starting from [W(NtBu).sub.2(NHtBu).sub.2]. The invention also relates to compounds according to the general formula [W(NtBu).sub.2(NR.sup.AR.sup.B).sub.2] (I), obtainable according to the claimed method, compounds according to general formula [W(NtBu).sub.2(NR.sup.AR.sup.B).sub.2] (I), with the exception of [W(NtBu).sub.2(NMe.sub.2).sub.2] and [W(NtBu).sub.2(NEtMe).sub.2], the use of a compound [W(NtBu).sub.2(NR.sup.AR.sup.B).sub.2] (I), and a substrate which, on a surface, has a tungsten layer or a tungsten-containing layer. Defined bis(tertbutylimido)bis(dialkylamido)tungsten compounds of the type [W(NtBu).sub.2(NR.sup.AR.sup.B).sub.2] (I) can be produced easily, economically and reproducibly in high purity and good yields by means of the described method. On account of their high purity, the compounds are suitable for producing high-quality substrates which have tungsten layers or tungsten-containing layers.

Molybdenum (IV) amide complexes are disclosed herein corresponding in structure to Formula (I): wherein: L is —NR.sup.1R.sup.2; R.sup.1 and R.sup.2 are C.sub.1-C.sub.6-alkyl or hydrogen; R is C.sub.1-C.sub.6-alkyl; and n is zero, 1, 2 or 3. Further, methods of forming MoO.sub.2 films by atomic layer deposition (ALD) using Formula (I) complexes and Mo[N(Me)(Et)].sub.4 are disclosed herein. ##STR00001##

Molybdenum (IV) amide complexes are disclosed herein corresponding in structure to Formula (I): wherein: L is —NR.sup.1R.sup.2; R.sup.1 and R.sup.2 are C.sub.1-C.sub.6-alkyl or hydrogen; R is C.sub.1-C.sub.6-alkyl; and n is zero, 1, 2 or 3. Further, methods of forming MoO.sub.2 films by atomic layer deposition (ALD) using Formula (I) complexes and Mo[N(Me)(Et)].sub.4 are disclosed herein. ##STR00001##

The disclosure provides a method of preparing a functionalized cyclic polymer the method including reacting a metal-alkylidyne compound, metallacycloalkylene compound, or metallacyclopentadiene compound with a plurality of alkynes to form the functionalized cyclic polymer, wherein at least one alkyne comprises a functional group capable of further reacting to form a modified polymer. Also provided is a stereoregular functionalized cyclic polymer prepared by the method of the disclosure.

The invention relates to dioxomolybdenum (VI) complex compounds of the formula MoO.sub.2(L).sub.x(Y).sub.2-x, where the ligand L has the formula (I). Such complex compounds are suitable in particular as catalysts for one- and two-component polyurethane compositions. The invention also relates to two-component polyurethane compositions including at least one polyisocyanate as the first component, at least one polyol as the second component, and at least one such dioxomolybdenum (VI) complex compound as the catalyst. The invention further relates to one-component polyurethane compositions comprising at least one polyurethane prepolymer with isocyanate groups, which are made from at least one polyisocyanate with at least one polyol, and comprising such a dioxomolybdenum (VI) complex compound as the catalyst. The invention additionally relates to different uses of said polyurethane compositions. ##STR00001##