Abstract: Provided is a radiation curable silicone composition suitable for additive manufacturing processes, a process for making such compositions, and a method for forming an article from such compositions. The compositions exhibit fast radiation curing over a variety of wavelengths. The articles formed from the compositions exhibit a good balance of properties including flexibility and mechanical strength. In embodiments, the organo-silicone composition comprises at least one polymerization-effective silicone containing polymer bearing unsaturated hydrocarbon group, at least one mercapto functional silicone resin, and a photo initiator.

Abstract: Provided is a one part, dual curable composition comprising (A) a first acrylic functional polyorganosiloxane with at least one moisture curable functional group, (B) a second acrylic functional polyorganosiloxane, which may optionally contain a moisture curable functional group, and (C) a third functional polyorganosiloxane, which optionally contains an acrylic and moisture curable functional group. The combination of (A), (B), and (C) provides a composition that is both moisture curable and radiation curable and provides a material that is fast curing via the dual cure functionality and provides a cured material exhibiting a relatively low modulus, good adhesion, and optical clarity.

Abstract: Provided is a one part, dual curable composition comprising (A) a first acrylic functional polyorganosiloxane with at least one moisture curable functional group, (B) a second acrylic functional polyorganosiloxane, which may optionally contain a moisture curable functional group, and (C) a third functional polyorganosiloxane, which optionally contains an acrylic and moisture curable functional group. The combination of (A), (B), and (C) provides a composition that is both moisture curable and radiation curable and provides a material that is fast curing via the dual cure functionality and provides a cured material exhibiting a relatively low modulus, good adhesion, and optical clarity.

Abstract: Tridentate pincer ligand supported metal complexes are formed where the complex is a trianionic pincer ligand supported metal-alkylidyne complex or a tetra-anionic pincer-ligand supported metallacycloalkylene complex formed by addition of an alkyne to the trianionic pincer ligand supported metal-alkylidyne complex. The tridentate pincer ligand supported metal complex that includes a group 5-7 transition metal and an OCO trianionic pincer ligand or an alkyne adduct thereof and methods of preparing the complexes are disclosed. The use of the tridentate pincer ligand supported metal complex for the polymerization of alkynes is disclosed, where high molecular weight poly(alkyne)s can be formed in high yield. The poly(alkyne) can be a macrocyclic polymer.

Abstract: Tridentate pincer ligand supported metal complexes are formed where the complex is a trianionic pincer ligand supported metal-alkylidyne complex or a tetra-anionic pincer-ligand supported metallacycloalkylene complex formed by addition of an alkyne to the trianionic pincer ligand supported metal-alkylidyne complex. The tridentate pincer ligand supported metal complex that includes a group 5-7 transition metal and an OCO trianionic pincer ligand or an alkyne adduct thereof and methods of preparing the complexes are disclosed. The use of the tridentate pincer ligand supported metal complex for the polymerization of alkynes is disclosed, where high molecular weight poly(alkyne)s can be formed in high yield. The poly(alkyne) can be a macrocyclic polymer.

Abstract: An embodiment of the invention is a novel Cr(V)OCO3? trianionic pincer ligand complex. Another embodiment of the invention is a catalytic method for oxidation of a substrate aerobically in the presence of a source of oxygen, where the novel Cr(V)OCO3? trianionic pincer ligand complex acts as the catalyst. The substrate can be a phosphine, amine, sulfide, alkene, alkane or a second metal complex. Another embodiment of the invention is directed to NCN pincer ligands that can form trianionic pincer ligand complexes.

Abstract: An embodiment of the invention is a novel Cr(V) OCO3- trianionic pincer ligand complex. Another embodiment of the invention is a catalytic method for oxidation of a substrate aerobically in the presence of a source of oxygen, where the novel Cr(V) OCO3- trianionic pincer ligand complex acts as the catalyst. The substrate can be a phosphine, amine, sulfide, alkene, alkane or a second metal complex. Another embodiment of the invention is directed to NCN pincer ligands that can form trianionic pincer ligand complexes.

Abstract: A complex for transference of a nitrogen atom to an electrophilic reagent comprises a hard-hard-hard pincer ligand and an early transition metal bound to a nitride. The pincer ligand can be an OCO ligand and the transition metal can be Mo. The complex can be used to transfer the nitrogen atom bound to the metal to an electrophile in a method to produce a nitrogen containing molecule. In one novel nitrogen transfer reaction, a Mo—N triple bond is broken where the nitrogen transfers to the sp2 hybridized carbon of an acid chloride to form a nitrile.

Abstract: A complex for transference of a nitrogen atom to an electrophilic reagent comprises a hard-hard-hard pincer ligand and an early transition metal bound to a nitride. The pincer ligand can be an OCO ligand and the transition metal can be Mo. The complex can be used to transfer the nitrogen atom bound to the metal to an electrophile in a method to produce a nitrogen containing molecule. In one novel nitrogen transfer reaction, a Mo—N triple bond is broken where the nitrogen transfers to the sp2 hybridized carbon of an acid chloride to form a nitrile.