anti atropisomer is preferred in the cis-o-C6BrF4 derivatives, particularly if the ancillary ligands extend out of the coordination plane. Strong through-space coupling between syn Fortho atoms of mutually cis R groups is observed in the 19F NMR spectra for cis-[Pd(C6BrF4)2L2] complexes. J-values were determined which prove useful to unequivocally identify the atropisomers formed and to detect distortions
合成了具有不对称芳基o -C 6 BrF 4和m -C 6 BrF 4的
钯(II)配合物,即[Pd 2(C 6 BrF 4)2(μ-Cl)2(
THT)2 ],反式- [
钯(C 6 BRF 4)
氯(
THT)2 ](
THT =
四氢噻吩),反式- [
钯(C 6 BRF 4)2大号2 ],和顺- [
钯(C 6 BRF 4)2大号2 ](L 2 = 2
THT,COD中,Me 2联
吡啶(
4,4'-二甲基-2,2'-联吡啶),
OPPy 2 Ph(上PY = 2-
吡啶基),2PMe 3,2CNMe)。阻转异构体的混合物(顺式-
溴,
溴和抗-
溴,
溴)被发现,对于大多数二(芳基)络合物,和的比顺式:反阻转异构体,取决于R基团时,顺式或反式的复合物的几何形状,和辅助
配体:一个比接近1:1,观察到的顺式-和反式-米-C6个BRF 4衍
生物和用于反式- ø -C 6 BRF 4种配合物,但是抗阻转异构体是优选的,所述顺式-