The present invention relates to a method for olefin oligomerization and comprising i) injecting an olefin monomer and a solvent into a continuous stirred tank reactor (CSTR); ii) injecting an oligomerization catalyst system comprising a ligand compound, a transition metal compound, and a co-catalyst into the continuous stirred tank reactor; and iii) performing a multimerization reaction of the olefin monomer, wherein a ratio of the flowing rates of the olefin monomer and the solvent is from 1:1 to 2:1. In the method for olefin oligomerization according to the present invention, high linear alpha-olefin selectivity may be attained even with a small amount of a solvent used by controlling reaction conditions during the multimerization reaction of olefin by a continuous reaction using a continuous stirred tank reactor.

The present specification relates to an olefin oligomerization method and specifically to an olefin oligomerization method comprising the step of subjecting an olefin to a multimerization reaction by controlling a reaction temperature such that the weight ratio of 1-hexene to 1-octene within a product comprising 1-hexene and 1-octene has a predetermined value, in the presence of an oligomerization catalyst system comprising a ligand compound, a transition metal compound, and a cocatalyst, wherein the predetermined value for the weight ratio of 1-hexene to 1-octene within the product is selected in a range of 1:0.5 to 1:7. By the method, 1-hexene and 1-octene can be produced in a desired ratio.

A method for preparing phosphine-borane complexes from aryldihalophosphine includes mixing sodium borohydride, a solvent having at least 50 vol % glycol ethers, and the aryldihalophosphine to obtain a solution. The solution is maintained at a reaction temperature for a duration of time to obtain the phosphine-borane complexes. The solvent may include 1,2-dimethoxyethane and tetrahydrofuran. A ratio of tetrahydrofuran to 1,2-dimethoxyethane in the solvent may be from 0.1:1.0 to 2.5:1.0.

Provided herein are functionalized phosphonates and methods for making same via phosphite addition to an atom alpha to an electron withdrawing group. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

The phosphine transition metal complex of the present invention is represented by formula (1). ##STR00001##
Preferably, R.sup.1 and R.sup.6 are identical groups, R.sup.2 and R.sup.7 are identical groups, R.sup.3 and R.sup.8 are identical groups, R.sup.4 and R.sup.9 are identical groups, R.sup.5 and R.sup.10 are identical groups, and n and y are identical numbers. The phosphine transition metal complex is suitably obtained by reacting a phosphine derivative represented by formula (2) and a phosphine derivative represented by formula (3) with a salt of a transition metal of gold, copper or silver. ##STR00002##
See the description for the meanings of the symbols in each formula.

The present invention discloses a fluorescent chromic material having a chemical formula of [PPy.sub.3Cu.sub.2I.sub.2].sub.n, wherein PPy.sub.3 is tripyridylphosphine. The present invention also provides a method for preparing the fluorescent chromic material, and the use of the fluorescent chromic material in the detection of dichloromethane vapor. The fluorescent chromic material of the present invention has simple synthesis steps, high yield, and capability of large production; and can be used as a fluorescent probe for detecting dichloromethane vapor. It has the advantages of simple operation, high selectivity, high sensitivity, good cycle performance and good stability.

The phosphine transition metal complex of the present invention is represented by formula (1).

##STR00001##

Preferably, R.sup.1 and R.sup.6 are identical groups, R.sup.2 and R.sup.7 are identical groups, R.sup.3 and R.sup.8 are identical groups, R.sup.4 and R.sup.9 are identical groups, R.sup.5 and R.sup.10 are identical groups, and n and y are identical numbers. The phosphine transition metal complex is suitably obtained by reacting a phosphine derivative represented by formula (2) and a phosphine derivative represented by formula (3) with a salt of a transition metal of gold, copper or silver.

##STR00002##

See the description for the meanings of the symbols in each formula.

In the field of organic phosphorus chemistry, especially the chemistry of bulky organophosphorus compounds, a process for the synthesis of compound of formula (I). This process is especially useful to obtain chiral bulky phosphorus compounds. The present invention also relates to compounds of formula (VII), (VIII), (IX) and (X) and their processes of manufacturing starting from a compound of formula (I).

##STR00001##

The present invention discloses a fluorescent chromic material having a chemical formula of [PPy.sub.3Cu.sub.2I.sub.2].sub.n, wherein PPy.sub.3 is tripyridylphosphine. The present invention also provides a method for preparing the fluorescent chromic material, and the use of the fluorescent chromic material in the detection of dichloromethane vapor. The fluorescent chromic material of the present invention has simple synthesis steps, high yield, and capability of large production; and can be used as a fluorescent probe for detecting dichloromethane vapor. It has the advantages of simple operation, high selectivity, high sensitivity, good cycle performance and good stability.

Provided herein are functionalized phosphonates and methods for making same via phosphite addition to an atom alpha to an electron withdrawing group. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.