Novel bidentate ligands of general formula (I) are described Formula (I): R represents a hydrocarbyl aromatic structure. The substituent(s) Yx on the aromatic structure has a total X=1-
n
ΣtY
X
of atoms other than hydrogen such that
X-1-n
ΣtY
X
is 4 where n is the total number of substituent(s) Y
X
and tY
X
represents the total number of atoms other than hydrogen on a particular substituent Y
X
. The groups X
1
, X
2
, X
3
and X
4
are joined to Q
1
or Q
2
via tertiary carbon atoms to the respective atom Q
1
or Q
2
; and Q
1
and Q
2
each independently represent phosphorus, arsenic or antimony. A catalyst system and a process for the carbonylation of ethylenically unsaturated compounds utilising the catalyst system is also described.
描述了一种通式为(I)的新型双齿
配体,通式(I):其中R代表一个烃基芳香结构,芳香结构上的取代基Yx除氢原子外的总原子数为X=1-nΣtYX,其中X-1-nΣtYX为4,n为取代基YX的总数,tYX代表特定取代基YX上除氢原子外的总原子数。基团X1、X2、X3和X4通过三级碳原子与各自的原子Q1或Q2连接;Q1和Q2各自独立地代表
磷、
砷或
锑。还描述了一种催化剂体系和利用该催化剂体系进行
乙烯基不饱和化合物羰基化的方法。