Uranium versus Thorium: Synthesis and Reactivity of [η(5) -1,2,4-(Me(3) C)(3) C(5) H(2) ](2) U[η(2) -C(2) Ph(2) ].
Uranium versus Thorium: Synthesis and Reactivity of [η(5) -1,2,4-(Me(3) C)(3) C(5) H(2) ](2) U[η(2) -C(2) Ph(2) ].
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铀与钍:[eta(5)-1,2,4-(Me3C)(3)C5H2](2)U[eta(2)-C2Ph2]的合成和反应性
DOI:
10.1002/chem.202100089
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发表时间:
2021-04-16
期刊:
影响因子:
--
通讯作者:
Walter MD
中科院分区:
文献类型:
--
作者:
Wang D;Ding W;Hou G;Zi G;Walter MD
The synthesis, electronic structure, and reactivity of a uranium metallacyclopropene were comprehensively studied. Addition of diphenylacetylene (PhC≡CPh) to the uranium phosphinidene metallocene [η 5‐1,2,4‐(Me3C)3C5H2]2U=P‐2,4,6‐tBu3C6H2 (1) yields the stable uranium metallacyclopropene, [η 5‐1,2,4‐(Me3C)3C5H2]2U[η 2‐C2Ph2] (2). Based on density functional theory (DFT) results the 5f orbital contributions to the bonding within the metallacyclopropene U‐(η 2‐C=C) moiety increases significantly compared to the related ThIV compound [η 5‐1,2,4‐(Me3C)3C5H2]2Th[η 2‐C2Ph2], which also results in more covalent bonds between the [η 5‐1,2,4‐(Me3C)3C5H2]2U2+ and [η 2‐C2Ph2]2− fragments. Although the thorium and uranium complexes are structurally closely related, different reaction patterns are therefore observed. For example, 2 reacts as a masked synthon for the low‐valent uranium(II) metallocene [η 5‐1,2,4‐(Me3C)3C5H2]2UII when reacted with Ph2E2 (E=S, Se), alkynes and a variety of hetero‐unsaturated molecules such as imines, ketazine, bipy, nitriles, organic azides, and azo derivatives. In contrast, five‐membered metallaheterocycles are accessible when 2 is treated with isothiocyanate, aldehydes, and ketones. The intrinsic reactivity of a stable uranium metallacyclopropene complex, [η 5‐1,2,4‐(Me3C)3C5H2]2U(η 2‐C2Ph2), was evaluated and compared to that of other uranium and thorium metallacyclopropenes. Although structurally similar, the thorium and uranium metallacyclopropenes exhibit distinctively different reactivity.
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DOI:
10.1007/978-3-642-12073-2_7
发表时间:
2010-01-01
期刊:
C-X BOND FORMATION
影响因子:
--
作者:
Eisen, Moris S.
通讯作者:
Eisen, Moris S.
影响因子:
2.8
作者:
Arias, Oscar;Petrov, Alex R.;Tamm, Matthias
通讯作者:
Tamm, Matthias
影响因子:
2.8
作者:
Evans, William J.;Miller, Kevin A.;Rheingold, Arnold L.
通讯作者:
Rheingold, Arnold L.
影响因子:
15
作者:
Beweries, Torsten;Fischer, Christian;Rosenthal, Uwe
通讯作者:
Rosenthal, Uwe
影响因子:
15
作者:
Beaumier, Evan P.;Gordon, Christopher P.;Tonks, Ian A.
通讯作者:
Tonks, Ian A.