Base-induced reversible H 2 addition to a single Sn( ii ) centre

Base-induced reversible H 2 addition to a single Sn( ii ) centre
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碱诱导可逆 H 2 加成到单个 Sn( ii ) 中心

DOI:
10.1039/c8sc03110j
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发表时间:
2018
期刊:
影响因子:
8.4
通讯作者:
Turnell-Ritson R
Turnell-Ritson R
中科院分区:
化学1区
文献类型:
--
作者:
Turnell-Ritson R

文献摘要

相似文献

一系列胺催化H2与[(Me 3Si)2CH]2Sn(1)的氧化加成(OA),形成[(Me 3Si)2CH] 2SnH 2(2)。实验和计算研究指出“受挫刘易斯对”机制,其中1作为一个刘易斯酸,并涉及不寻常的后期过渡状态,这是支持的观察Et 3 N的动力学同位素效应。当使用DBU时,H2活化的能量学被改变,允许建立1,2和加合物[1·DBU]之间的平衡,从而证明H2在单个主基中心的可逆氧化加成/还原消除(RE)。
A range of amines catalyse the oxidative addition (OA) of H2 to [(Me3Si)2CH]2Sn (1), forming [(Me3Si)2CH]2SnH2 (2). Experimental and computational studies point to ‘frustrated Lewis pair’ mechanisms in which 1 acts as a Lewis acid and involve unusual late transition states; this is supported by the observation of a kinetic isotope effect for Et3N. When DBU is used the energetics of H2 activation are altered, allowing an equilibrium between 1, 2 and adduct [1·DBU] to be established, thus demonstrating reversible oxidative addition/reductive elimination (RE) of H2 at a single main group centre.