Modifying Phosphorus(III) Substituents to Activate Remote Ligand-Centered Reactivity in Triaminoborane Ligands
Modifying Phosphorus(III) Substituents to Activate Remote Ligand-Centered Reactivity in Triaminoborane Ligands
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修饰磷(III)取代基以激活三氨基硼烷配体中以远程配体为中心的反应性
DOI:
10.1021/acs.organomet.0c00321
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发表时间:
2020
期刊:
影响因子:
2.8
通讯作者:
Daly, Scott R.
中科院分区:
文献类型:
--
作者:
Lee, Kyounghoon;Culpepper, Johnathan D.;Parveen, Riffat;Swenson, Dale C.;Vlaisavljevich, Bess;Daly, Scott R.
Triaminoborane-bridged diphosphorus ligands called TBDPhos can undergo cooperative ligand-centered reactions at the 1,8,10,9-triazaboradecalin (TBD) backbone while bound to metals, but the factors that control this reactivity are not well understood. Previous studies showed that TBDPhos reactivity is highly sensitive to phosphorus substituents, ancillary ligands, and metal coordination environment despite these changes being significantly removed from the reactive N–B bond. Here we describe how exchanging phenyl and ethyl substituents attached to phosphorus with methoxy turns on ligand-centered reactions in otherwise unreactive (TBDPhos)Pt(S2C6H4) and (TBDPhos)Mo(CO)4complexes. The synthesis and characterization of the complexes are described alongside comparative reactivity studies using MeOH as a simple but effective test substrate. Complementary density functional theory (DFT) calculations on an expanded series of (TBDPhos)Pt(S2C6H4) complexes corroborate the experimental results and show that both size and electronic properties of the phosphorus substituents can significantly influence the Gibbs free energy of reaction at the remote ligand site. These results demonstrate how seemingly ancillary ligand modifications can levy significant control over ligand-centered reactivity in TBDPhos complexes, which may be relevant when considering the design of other chemically reactive ligands with Lewis acidic functional groups.
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影响因子:
4.6
作者:
Kyounghoon Lee;Clara Kirkvold;Bess Vlaisavljevich;Scott R. Daly
通讯作者:
Scott R. Daly
DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
中村賀美;竹内孝江
通讯作者:
竹内孝江
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
Rajkumar Jana;S. Chakraborty;O. Blacque;H. Berke
通讯作者:
H. Berke
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
Alexandra M. Z. Slawin;M. Wainwright;J. Woollins
通讯作者:
J. Woollins
影响因子:
4.6
作者:
Kiernicki, John J.;Zeller, Matthias;Szymczak, Nathaniel K.
通讯作者:
Szymczak, Nathaniel K.