Metal‐Ligand Cooperativity to Assemble a Neutral and Terminal Niobium Phosphorus Triple Bond (Nb≡P)

Metal‐Ligand Cooperativity to Assemble a Neutral and Terminal Niobium Phosphorus Triple Bond (Nb≡P)
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金属-配体协同组装中性末端铌磷三键 (Nb-P)

DOI:
10.1002/anie.202212488
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发表时间:
2022
期刊:
Angewandte Chemie International Edition
影响因子:
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通讯作者:
Mindiola, Daniel J.
Mindiola, Daniel J.
中科院分区:
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文献类型:
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作者:
Senthil, Shuruthi;Kwon, Seongyeon;Fehn, Dominik;Im, Hoyoung;Gau, Michael R.;Carroll, Patrick J.;Baik, Mu‐Hyun;Meyer, Karsten;Mindiola, Daniel J.

文献摘要

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脱羰反应沿着P-原子从磷炔阴离子PCO−转移到NbIV络合物[(PNP)NbCl 2(NtBuAr)](1)(PNP=N[2-PiPr 2 - 4-methylphenyl]2-; Ar= 3,5-Me 2C 6 H3),导致其与钳形配体的一个膦臂偶联,产生亚膦基膦烷络合物[(PNPP)NbCl(NtBuAr)](2)。用CoCp* 2还原2会使P-P键断裂,形成第一个中性的5族过渡金属的末端磷络合物,即[(PNP)Nb <$P(NtBuAr)](3)。理论研究已经被用来理解P-原子的耦合和P-P键的还原裂解。3与双电子氧化剂(如硫化乙烯)反应产生具有P-P偶联配体的抗磁性硫基络合物,即[(PNPP)Nb=S(NtBuAr)](4)。
Decarbonylation along with P‐atom transfer from the phosphaethynolate anion, PCO−, to the NbIVcomplex [(PNP)NbCl2(NtBuAr)] (1) (PNP=N[2‐PiPr2‐4‐methylphenyl]2−; Ar=3,5‐Me2C6H3) results in its coupling with one of the phosphine arms of the pincer ligand to produce a phosphanylidene phosphorane complex [(PNPP)NbCl(NtBuAr)] (2). Reduction of2with CoCp*2cleaves the P−P bond to form the first neutral and terminal phosphido complex of a group 5 transition metal, namely, [(PNP)Nb≡P(NtBuAr)] (3). Theoretical studies have been used to understand both the coupling of the P‐atom and the reductive cleavage of the P−P bond. Reaction of3with a two‐electron oxidant such as ethylene sulfide results in a diamagnetic sulfido complex having a P−P coupled ligand, namely [(PNPP)Nb=S(NtBuAr)] (4).