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Bonding and Reactivity of a Pair of Neutral and Cationic Heterobimetallic RuZn2 Complexes
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2021-10-18 , DOI: 10.1021/acs.inorgchem.1c02072
Fedor M Miloserdov 1, 2 , Anne-Frédérique Pécharman 1 , Lia Sotorrios 3 , Nasir A Rajabi 3 , John P Lowe 1 , Stuart A Macgregor 3 , Mary F Mahon 1 , Michael K Whittlesey 1
Affiliation  

A combined experimental and computational study of the structure and reactivity of two [RuZn2Me2] complexes, neutral [Ru(PPh3)(Ph2PC6H4)2(ZnMe)2] (2) and cationic [Ru(PPh3)2(Ph2PC6H4)(ZnMe)2][BArF4] ([BArF4] = [B{3,5-(CF3)2C6H3}4]) (3), is presented. Structural and computational analyses indicate these complexes are best formulated as containing discrete ZnMe ligands in which direct Ru–Zn bonding is complemented by weaker Zn···Zn interactions. The latter are stronger in 2, and both complexes exhibit an additional Zn···Caryl interaction with a cyclometalated phosphine ligand, this being stronger in 3. Both 2 and 3 show diverse reactivity under thermolysis and with Lewis bases (PnBu3, PCy3, and IMes). With 3, all three Lewis bases result in the loss of [ZnMe]+. In contrast, 2 undergoes PPh3 substitution with PnBu3, but with IMes, loss of ZnMe2 occurs to form [Ru(PPh3)(C6H4PPh2)(C6H4PPhC6H4Zn(IMes))H] (7). The reaction of 3 with H2 affords the cationic trihydride complex [Ru(PPh3)2(ZnMe)2(H)3][BArF4] (12). Computational analyses indicate that both 12 and 7 feature bridging hydrides that are biased toward Ru over Zn.

中文翻译:


一对中性和阳离子异双金属 RuZn2 配合物的键合和反应性



对两种 [RuZn 2 Me 2 ] 配合物、中性 [Ru(PPh 3 )(Ph 2 PC 6 H 4 ) 2 (ZnMe) 2 ] ( 2 ) 和阳离子 [Ru( PPh 3 ) 2 (Ph 2 PC 6 H 4 )(ZnMe) 2 ][BAr F 4 ] ([BAr F 4 ] = [B{3,5-(CF 3 ) 2 C 6 H 3 } 4 ]) ( 3 ),提出。结构和计算分析表明,这些配合物最好配制为包含离散的 ZnMe 配体,其中直接的 Ru-Zn 键合由较弱的 Zn·Zn 相互作用补充。后者在2中更强,并且两种配合物都表现出与环金属化膦配体的额外 Zn·C芳基相互作用,这在3中更强。 23在热解作用下以及与路易斯碱(P n Bu 3 、PCy 3和IMes)均表现出不同的反应性。对于3 ,所有三个路易斯碱都会导致 [ZnMe] +的损失。相反, 2经历了用P n Bu 3进行PPh 3取代,但对于IMes,ZnMe 2发生损失,形成[Ru(PPh 3 )(C 6 H 4 PPh 2 )(C 6 H 4 PPhC 6 H 4 Zn( IMes))H]( 7 )。 3与H 2的反应得到阳离子三氢络合物[Ru(PPh 3 ) 2 (ZnMe) 2 (H) 3 ][BAr F 4 ]( 12 )。计算分析表明, 127均具有桥联氢化物,这些氢化物更倾向于 Ru 而不是 Zn。
更新日期:2021-11-01
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