Thiacalix[3]pyridine (Py3S3) reacted with [Rh(diene)(μ-Cl)]2
(diene = 1,5-cyclooctadiene (cod), 2,5-norbornadiene (nbd)) to give amphiphilic trigonal bipyramidal complexes, [Rh(Py3S3)(diene)]Cl. Sulfur bridges of the Py3S3 ligand in these complexes were selectively oxygenated by m-chloroperoxybenzoic acid in dichloromethane to give sulfinylcalix[3]pyridine complexes, [RhPy3(SO)3}(diene)]+, in which all three oxygen atoms of the SO groups occupy the equatorial positions. Structures of the complexes were analysed by X-ray crystallography and the oxidation reaction was investigated using 1H NMR spectroscopy and electrospray ionisation mass spectrometry showing that the oxygenation of the sulfur atoms in the ligand proceeded stepwise and further oxygenation of the SO moiety occurred only for the nbd complex having the smaller diene ligand resulting in [RhPy3(SO)2(SO2)}(nbd)]+. On the other hand, the oxidation of [Rh(Py3S3)(cod)]+ by H2O2 in water did not result in oxygenation of the sulfur bridges but the cod ligand is hydroxygenated to give 1,4,5,6-η4-2-hydroxycycloocta-4-ene-1,6-di-yl.
Thiacalix[3]
吡啶(Py3S3)与[Rh(diene)(μ-Cl)]2(diene =
1,5-环辛二烯 (cod),2,5-诺尔本二烯 (nbd))反应生成两性三角双锥复合物[Rh(Py3S3)(diene)]Cl。这些复合物中Py3S3
配体的
硫桥选择性地被
氯过氧
苯甲酸在
二氯甲烷中氧化,生成
硫酰基calix[3]
吡啶复合物[RhPy3(SO)3}(diene)]+,其中SO基团的三个氧原子全部占据赤道位置。通过X射线晶体学分析了这些复合物的结构,使用1H NMR光谱和电喷雾电离质谱研究了氧化反应,结果表明
配体中
硫原子的氧化是逐步进行的,并且SO基团的进一步氧化仅发生在具有较小diene
配体的nbd复合物中,生成[RhPy3(SO)2(SO2)}(nbd)]+。另一方面,通过
H2O2在
水中氧化[Rh(Py3S3)(cod)]+并未导致
硫桥的氧化,但cod
配体被氢氧化生成1,4,5,6-η4-2-羟基环
辛烯-1,6-二基。