摘要:
The invention concerns the use of zinc derivatives of general formula (I) wherein: L1 represents a group of formula: —E14(R14)(R′14)(R″14), —E15(R15) (R′15) or —E16(R16); E is an atom of group 15; L2 and L3 independently represent a group of formula: —E14(R14)(R′14)(R″14), —E15(R15)(R′15) or —E16(R16), or together form a chain of formula —L′2—A—L′3—; A represents a saturated or unsaturated chain comprising one, two or three elements of group 14; L′2 and L′3 independently represent a group of formula —E14(R14)(R′14) —E15(R15) or —E16—; E14 is an element of group 14; E15 is an element of group 15; E16 is an element of group 16; R14, R′14, R″14, R15, R′15 and R16 represent various groups, as (co) polymerisation catalysts of cyclic esters
摘要:
The use of stannylenes and germylenes of general formula (I) wherein: M represents a tin or geranium atom; L1 and L2 independently represent a group of formula: -E14(R14) (R′14) (R″14), -E15(R15) (R′15) or -E16(R16)) or together form a chain of formula -L′1-A- L′2; A represents a saturated or unsaturated chain comprising one, two or three elements of group 14; L′1 and L′2, represent, independently, a group of formula: -E14(R14) (R′14)-, E15(R15)- or -E16-; E14 is an element of group 14; E15 is an element of group 15; E16 is an element of group 16; R14, R′14, R″14, R15, R′15 and R16 represent variable groups as polymerization catalysts of heterocycles.
摘要翻译:使用通式(I)的二甲苯和二甲苯,其中:M表示锡或天竺鼠原子; L 1和L 2独立地表示下式基团:-E 14(R 14)(R 14) (R“14”),-E 15(R 15)(R 15) 15)或-E 16(R 16))或一起形成式-L'1 -A- L'2 A表示饱和或不饱和链,其包含第14族的一个,两个或三个元素; L'1和L'2个独立地表示下式的基团:-E 14(R 14) >)(R'14) - ,E 15(R 15) - 或-E 16 - 。 E 14是组14的元素; E 15是组15的元素; E 16是组16的元素; R 14,R 14,R“14,R 15,R 15, / SUB>和R 16表示可变基团作为杂环的聚合催化剂。
摘要:
A subject of the present invention is new compounds having a lanthanide and having a tridentate ligand, a process for their preparation and their use in particular as polymerization catalysts.
摘要:
A subject of the present invention is new compounds having a lanthanide and having a tridentate ligand, a process for their preparation and their use in particular as polymerization catalysts.
摘要:
The invention relates to new compounds having an element of group 12 and having a tridentate ligand, a process for their preparation and their use in particular as a polymerization catalyst.
摘要:
The invention concerns novel organometallic complexes comprising cationic heterocyclic carbenes. It also concerns a method for preparing said complexes from dicationic heterocyclic precursor compounds. It further concerns the use as catalysts of said organometallic complexes for a certain number of chemical reactions.