The reactions of [AuCl(SMe
2
)] or
[AuBr(C
4
H
8
S)] with 1 equivalent of
diphenylmethanimine led to the formation of the complexes
[AuCl(Ph
2
CNH)] 1a,
[Au(Ph
2
CNH)
2
][AuCl
2
] 1b
and [Au(Ph
2
CNH)
2
][AuBr
2
]
2, respectively. Treatment of 1a, 1b with KI in
the two-phase system dichloromethane–water induced a redox process to
give Au
0
and
[Au(Ph
2
CNH)
2
][I
3
] 3. The
same result was obtained when AuI and Ph
2
CNH were
allowed to react under anhydrous and oxygen-free conditions.
Copper(I) iodide reacted with an excess of
Ph
2
CNH with formation of the complex
[CuI(Ph
2
CNH)] 4. Bis(diphenylmethanimine)
complexes of gold,
[Au(Ph
2
CNH)
2
]BF
4
5, and
silver, [Ag(Ph
2
CNH)
2
]BF
4
6, were prepared by the reaction of 2 equivalents of the ketimine
and [Au(PhCN)
2
]BF
4
or AgBF
4
in
dichloromethane or tetrahydrofuran solutions, respectively. The crystal
structures of the complexes 1a, 1b, 2,
3, 5 and 6 have been determined. The
(Ph
2
CNH)AuCl units of compound 1a form infinite
zigzag chains via weak
Au · · · Au contacts
[3.3633(5) Å]. In 1b two AuCl
2
-
anions and two (Ph
2
CNH)
2
Au
+
cations form a tetranuclear Z-type unit with
Au · · · Au contacts of
3.1944(5)
[Au(1) · · · Au(2)],
3.604(1)
[Au(1) · · · Au(2′)]
and 3.392(1)Å
[Au(1) · · · Au(1
′)]. The
N–H · · · Cl
geometry suggests hydrogen bonding between the hydrogen and chlorine atoms
of neighbouring ions. The bromine compound 2 is isostructural to
the chloride 1b with slightly longer
Au · · · Au distances.
Compound 3 shows bis(diphenylmethanimine)gold(I)
cations and triiodide anions with no anomalies in the packing and in bond
distances and angles. The geometry of the silver(I) and
gold(I) complexes 5 and 6 are quite similar
except for the observation that the Au–N bond is 0.11 Å
shorter than the Ag–N bond, which suggests that two-co-ordinate
gold(I) is indeed smaller than two-co-ordinate
silver(I) in systems with nitrogen-containing ligands, as
previously observed for phosphine complexes.
AuCl(SMe 2 )] 或 [AuBr(C 4 H 8 S)] 与 1 个等量的二苯基甲
亚胺反应,分别生成络合物 [AuCl(Ph 2 CNH)] 1a、[Au(Ph 2 CNH) 2 ][AuCl 2 ] 1b 和 [Au(Ph 2 CNH) 2 ][AuBr 2 ] 2。在
二氯甲烷-
水的两相体系中,用 KI 处理 1a 和 1b,会产生氧化还原过程,生成 Au 0 和 [Au(Ph 2 CNH) 2 ][I 3 ]3。
碘化亚铜与过量的 Ph 2 CNH 反应生成复合物 [CuI(Ph 2 CNH)] 4。在
二氯甲烷或
四氢呋喃溶液中分别加入 2 个等量的酮
亚胺和 [Au(PhCN) 2 ]BF 4 或 AgBF 4,制备出了
金的双(二苯基甲
亚胺)络合物 [Au(Ph 2 CNH) 2 ]BF 4 5 和
银的双(二苯基甲
亚胺)络合物 [Ag(Ph 2 CNH) 2 ]BF 4 6。复合物 1a、1b、2、3、5 和 6 的晶体结构已经确定。化合物 1a 中的(Ph 2 CNH)AuCl 单元通过弱 Au - - Au 接触 [3.3633(5) Å]形成无限的之字链。在 1b 中,两个 AuCl 2 - 阴离子和两个 (Ph 2 CNH) 2 Au + 阳离子形成一个四核 Z 型单元,其 Au - - Au 接触点分别为 3.1944(5)[Au(1) - - Au(2)]、3.604(1) [Au(1) - - Au(2′)] 和 3.392(1)Å [Au(1)- - Au(1′)]。N-H - - Cl 几何结构表明相邻离子的氢原子和
氯原子之间存在氢键。
溴化合物 2 与
氯化物 1b 结构相同,但 Au - - Au 间距稍长。 化合物 3 显示了双(二苯基甲
亚胺)
金(I)阳离子和三
碘化物阴离子,在堆积、键间距和角度方面没有异常。
银(I)和
金(I)配合物 5 和 6 的几何形状非常相似,只是 Au-N 键比 Ag-N 键短 0.11 Å,这表明在含氮
配体的体系中,两配位
金(I)确实比两配位
银(I)小,正如以前在膦配合物中观察到的那样。