作者:Andreas A. Danopoulos、Robyn S. Hay-Motherwell、Geoffrey Wilkinson、Sean M. Cafferkey、Tracy K. N. Sweet、Michael B. Hursthouse
DOI:10.1039/a703028b
日期:——
Interaction of N
3
R with Ir(mes)
3
(mes = mesityl,
C
6
H
2
Me
3
-2,4,6) gave products dependent
on the nature of the azide. When R = mes, the tetrazenido
amide complex 1 is obtained in which dehydrogenative coupling of the
mesityl groups via the o-methyls has occurred;
thermolysis of 1 in toluene resulted in cleavage of the tetrazene ring
and formation of amide complex 2. When R = Ph, the aryl
tetrazenido amide complex 3 is formed. Photolysis of a mixture of
N
3
(mes) and [RuCl
2
(PPh
3
)
3
]
followed by phosphine exchange gave the tetrazene complex
[Ru
II
Cl
2
N
4
(mes)
2
}(PMe
3
)
2
] 4. Thermal reaction of
[RuCl
2
H
2
(PPr
i
3
)
2
]
with N
3
(mes) gave the triazenophosphorane complex
[RuCl
3
(PPr
i
3
)N
3
(mes)
PPr
i
3
}] 5. The ruthenium allyl amide
[Ru(PMe
3
)
3
NHC
6
H
3
Pr
i
(η
3
-CH
2
CCH
2
)}] 6
bearing a new hybrid ligand was obtained by interaction of
trans-[RuCl
2
(PMe
3
)
4
] with
Li[NH(C
6
H
3
Pr
i
2
-2,6)] in
di-n-butyl ether. Plausible reaction mechanisms accounting for
the formation of the new compounds are proposed. Finally, the crystal
structures of the complexes 1–6 have been determined. Complexes 1
and 2 have pseudo-square planar geometries involving the olefin formed
by the coupled methyl groups of two mesityls and three (1) or two (2)
amide nitrogens and a chlorine atom (2). Compound 3 has a trigonal
bipyramidal metal centre with the axial Ir–N amide bonds longer
than the equatorial ones; 4 has an octahedral structure with a bidentate
tetragonal ligand and trans phosphines whilst 5 is distorted
octahedral with a N,N-chelating phosphazide ligand. Complex 6 is also
octahedral with the allyl groups occupying cis sites and the
three Ru–P bonds in a facial arrangement.
N的相互作用
3
R 与 Ir(mes)
3
(mes = 异丙苯,
C
6
H
2
我
3
-2,4,6) 给定产品依赖
关于叠氮化物的性质。当R=mes时,四氮烯基
得到酰胺络合物1,其中脱氢偶联
发生了通过邻甲基的异三甲苯基;
1在甲苯中热解导致四氮烯环断裂
并形成酰胺络合物 2. 当 R = Ph 时,芳基
形成四氮烯基酰胺络合物3。混合物的光解
氮
3
(mes) 和 [RuCl
2
(PPh
3
)
3
]
然后进行膦交换得到四氮烯络合物
[汝
二
氯
2
N
4
(中)
2
}(PMe
3
)
2
] 4.热反应
[氯化钌
2
H
2
(PPr
我
3
)
2
]
与 N
3
(mes) 得到三氮杂正膦络合物
[氯化钌
3
(PPr
我
3
)N
3
(中)
聚丙稀
我
3
}] 5. 烯丙基酰胺钌
[钌(PMe
3
)
3
国家卫生健康委
6
H
3
普罗
我
(η
3
-CH
2
中西医结合中心
2
)}] 6
通过相互作用获得了一种新的杂化配体
反式-[RuCl
2
(PMe
3
)
4
] 和
锂[NH(C
6
H
3
普罗
我
2
-2,6)] 在
二正丁基醚。合理的反应机制
提出了新化合物的形成。最后是水晶
配合物1-6的结构已确定。配合物1
和 2 具有涉及所形成的烯烃的伪正方形平面几何形状
由两个均三甲苯基和三 (1) 或两 (2) 个偶联的甲基
酰胺氮和氯原子(2)。化合物3具有三角形
双锥体金属中心,轴向 Ir-N 酰胺键较长
比赤道地区; 4 具有二齿八面体结构
四方配体和反式膦,而 5 是扭曲的
具有 N,N-螯合磷叠氮配体的八面体。综合体 6 也是
烯丙基占据顺式位点的八面体,
面排列中的三个 Ru-P 键。