Thiobenzamide reacted with the complexes
[MCl
2
(PPh
3
)
3
],
[MH(X)(CO)(PPh
3
)
3
] (M = Ru or Os,
X = H or Cl) and
mer-[IrH
3
(PPh
3
)
3
] in boiling
toluene to afford the products
[MS(NH)CPh}
2
(PPh
3
)
2
],
[MXS(NH)CPh}(CO)(PPh
3
)
2
] and
[IrH
2
S(NH)CPh}(PPh
3
)
2
]
respectively. The crystal structure of
[OsS(NH)CPh}
2
(PPh
3
)
2
]
confirms the expected bis(N,S-chelate) formulation and has established
the presence of cis-phosphorus, cis-nitrogen and
trans-sulfur donor atom pairs within a highly distorted
octahedral co-ordination sphere. Thiobenzoic acid reacted with
[MCl
2
(PPh
3
)
3
] and
[MH(X)(CO)(PPh
3
)
3
] under similar conditions to
yield [MS(O)CPh}
2
(PPh
3
)
2
]
and [MS(O)CPh}
2
(CO)(PPh
3
)
2
]
respectively. The reactions of thiobenzoic acid with
mer-[IrH
3
(PPh
3
)
3
] under
conditions of increasing severity give
[IrH
2
S(O)CPh}(PPh
3
)
3
],
[IrHS(O)CPh}
2
(PPh
3
)
2
] and
[IrS(O)CPh}
3
(PPh
3
)
2
] the
last two of which on carbonylation afford
[IrHS(O)CPh}
2
(CO)(PPh
3
)
2
]
and [IrS(O)CPh}
3
(CO)(PPh
3
)
2
]
respectively. The crystal structure of
[IrHS(O)CPh}
2
(PPh
3
)
2
] has
established the presence of trans phosphorus and trans
sulfur donor atom pairs, with the η
1
- and
η
2
-thiobenzoate ligands sharing a meridional set of three
co-ordination sites. However, the NMR spectra of this complex show two
high-field
1
H triplets and two
31
P-
1
H} singlets. Possible explanations
for this anomalous NMR behaviour, which is also found for the
corresponding thioacetate, are advanced.
硫代苯酰胺与复合物[MCl₂(PPh₃)₃]、[
MH(X)(CO)(PPh₃)₃](M = Ru 或 Os,X = H 或 Cl)以及mer-[IrH₃(PPh₃)₃]在沸腾的
甲苯中反应,产生了产品[MS(NH)CPh}₂(PPh₃)₂]、[MXS(NH)CPh}(CO)(PPh₃)₂]和[IrH₂S(NH)CPh}(PPh₃)₂]。复合物[OsS(NH)CPh}₂(PPh₃)₂]的晶体结构确认了预期的双(N,S-螯合)结构,并证实了在高度扭曲的八面体配位环境中存在顺式
磷、顺式氮和反式
硫供体原子对。
硫代苯甲酸在类似条件下与[MCl₂(PPh₃)₃]和[
MH(X)(CO)(PPh₃)₃]反应,分别生成[MS(O)CPh}₂(PPh₃)₂]和[MS(O)CPh}₂(CO)(PPh₃)₂]。
硫代苯甲酸与mer-[IrH₃(PPh₃)₃]在逐渐加剧的条件下反应,生成[IrH₂S(O)CPh}(PPh₃)₃]、[IrHS(O)CPh}₂(PPh₃)₂]和[IrS(O)CPh}₃(PPh₃)₂],后两者通过羰基化反应得到[IrHS(O)CPh}₂(CO)(PPh₃)₂]和[IrS(O)CPh}₃(CO)(PPh₃)₂]。复合物[IrHS(O)CPh}₂(PPh₃)₂]的晶体结构确定了存在反式
磷和反式
硫供体原子对,其中η₁-和η₂-
硫代苯甲酸配体共享一组横向各三个配位位点。然而,该配合物的NMR光谱显示两个高场的¹H三重态和两个³¹P-¹H}单重态。对这种异常的NMR行为(在相应的
硫代乙酸盐中也发现)的可能解释得到了提出。