Methods of preparing ruthenium carbene complex precursors are disclosed herein. In some embodiments, the methods include reacting a ruthenium refinery salt with an L-type ligand and a reducing agent to form the ruthenium carbene complex precursor. Methods of preparing a ruthenium vinylcarbene complex are also disclosed. In some embodiments, preparing a ruthenium carbene complex includes converting a ruthenium carbene complex precursor into a ruthenium carbene complex having a structure (PR.sup.1R.sup.2R.sup.3).sub.2Cl.sub.2RuCHR.sup.4, wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are defined herein.

The invention provides a polymer comprising two or more residues of formula III or IV or salts thereof: wherein dash line, X, Y, Q, L, M, n, R.sup.1, R.sup.2, R.sup.a, R.sup.b, R.sup.c and R.sup.d have any of the values defined in the specification, as well as synthetic intermediates and synthetic methods useful for preparing the compounds. The polymer is useful to treat contaminated water by chelating metal.

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The present invention refers to novel ruthenium-based catalysts for olefin metathesis reactions, particularly to fast initiating catalysts having stereoselective properties. In olefin metathesis reactions, the disclosed catalysts provide a high catalytic activity combined with the capability to generate higher yields of the olefin metathesis product.

A method of producing polymer fibers and/or particles by direct polymerization of monomers without use of any external high energy sources (such as heat or UV) is described. The method may be used to fabricate polymer fibers, fiber mats, 3D polymer fiber structures, and polymer nano- and microparticles. Polymer fibers may be used to create fiber mats which can be utilized in a variety of applications.

A method of carrying out a metathesis reaction includes the combination of at least one alkene or non conjugated diene with a Ruthenium-based catalyst with an cyclic(alkyl)(amino)carbene ligand to form a reaction mixture and heating the reaction mixture to a temperature of 100 C. or greater. The reaction can be an ADMET, ROMP, a metathesis ring-closure or an olefin exchange reaction.

Embodiments in accordance with the present invention encompass compositions encompassing a latent catalyst and a thermal or photoactivator along with one or more monomers which undergo ring open metathesis polymerization (ROMP) when said composition is heated to a temperature from 50 C. to 100 C. or higher to form a substantially transparent film. Alternatively the compositions of this invention also undergo polymerization when subjected to suitable radiation. The monomers employed therein have a range of refractive index from 1.4 to 1.6 and thus these compositions can be tailored to form transparent films of varied refractive indices. The compositions of this invention further comprises inorganic nanoparticles which form transparent films and further increases the refractive indices of the compositions. Accordingly, compositions of this invention are useful in various opto-electronic applications, including as coatings, encapsulants, fillers, leveling agents, among others.

Disclosed are methods, compositions, reagents, systems, and kits to prepare and utilize branched multi-functional macromonomers, which contain a ring-opening metathesis polymerizable norbornene group, one or more reactive sites capable of undergoing click chemistry, and a terminal acyl group capable of undergoing a coupling reaction; branched multi-cargo macromonomers; and the corresponding polymers are disclosed herein. Various embodiments show that the macromonomers and polymers disclosed herein display unprecedented control of cargo loading of agents. These materials have the potential to be utilized for the treatment of diseases and conditions such as cancer and hypertension.

The present disclosure provides cis-polycycloolefins and methods for forming cis-polycycloolefins typically having 50% or greater cis carbon-carbon double bonds comprising contacting a first cyclic hydrocarbyl monomer with a catalyst represented by Formula (I):

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wherein: M is a group 8 metal; Q.sup.1, Q.sup.2, and Q.sup.3 are independently oxygen or sulfur; each of R.sup.1 and R.sup.4 is a halogen; R.sup.9 is C.sub.1-C.sub.40 hydrocarbyl or C.sub.1-C.sub.40 substituted hydrocarbyl; and each of R.sup.2, R.sup.3, R.sup.5, R.sup.6, R.sup.7, R.sup.8, R.sup.10, R.sup.11, R.sup.12, R.sup.13, R.sup.14, R.sup.15, R.sup.16, R.sup.17, R.sup.18, and R.sup.19 is independently hydrogen, halogen, C.sub.1-C.sub.40 hydrocarbyl or C.sub.1-C.sub.40 substituted hydrocarbyl. In at least one embodiment, a polycyclopentene has 50% or greater cis carbon-carbon double bonds.

Disclosed is a novel transition metal complex containing N-heterocyclic carbene and a sulfonamide group, or N-heterocyclic carbene and an amide group, and application thereof, the transition metal complex having a wider range of general purposes in olefin metathesis and being able to be variably controlled in reactivity.

The invention relates to immobilized metal alkylidene catalysts. The catalysts are useful in olefin metathesis.

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