Synthetic approaches to (smif)2Ti (smif = 1,3-di-(2-pyridyl)-2-azaallyl) reveal redox non-innocence and C-C bond-formation.
Synthetic approaches to (smif)2Ti (smif = 1,3-di-(2-pyridyl)-2-azaallyl) reveal redox non-innocence and C-C bond-formation.
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(SMIF)2TI(SMIF = 1,3-二 - (2-吡啶基)-2-Zaallyl)的合成方法揭示了氧化还原的非源性和C-C键形成。
DOI:
10.1021/ic300590t
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发表时间:
2012-08-06
影响因子:
4.6
通讯作者:
Cundari TR
中科院分区:
文献类型:
--
作者:
Frazier BA;Wolczanski PT;Keresztes I;DeBeer S;Lobkovsky EB;Pierpont AW;Cundari TR
Attempted syntheses of (smif)2Ti (smif = 1,3-di-(2-pyridyl)-2-azaallyl) based on metatheses of TiClnLm (n = 2–4) with M(smif) (M = Li, Na), in the presence of a reducing agent (Na/Hg) when necessary, failed, but several apparent Ti(II) species were identified by X-ray crystallography and multidimensional NMR spectroscopy: (smif){Li(smif-smif)}Ti (1, X-ray), [(smif)Ti]2(μ-κ3,κ3-N,N(py)2-smif,smif) (2), (smif)Ti(κ3-N,N(py)2-smif,(smif)H) (3), and (smif)Ti(dpma) (4). NMR spectroscopy and K-edge XAS showed that each compound possesses ligands that are redox non-innnocent, such that d Ti(III) centers AF-couple to ligand radicals: (smif){Li(smif-smif)2−}TiIII (1), [(smif2−)TiIII]2(μ-κ3,κ3-N,N(py)2-smif,smif) (2), [(smif2−)TiIII](κ3-N,N(py)2-smif,(smif)H) (3), and (smif2−)TiIII(dpma) (4). The instability of the (smif)2Ti relative to its C-C coupled dimer, 2, is rationalized via the complementary nature of the amide and smif radical anion ligands, which are also common to 3 and 4. Calculations support this contention.
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影响因子:
4.6
作者:
Frazier, Brenda A.;Bartholomew, Erika R.;Cundari, Thomas R.
通讯作者:
Cundari, Thomas R.
影响因子:
2.8
作者:
DIMAURO, PT;WOLCZANSKI, PT
通讯作者:
WOLCZANSKI, PT
影响因子:
15
作者:
Bart, Suzanne C.;Chlopek, Krzysztof;Chirik, Paul J.
通讯作者:
Chirik, Paul J.
影响因子:
4.4
作者:
BECKE, AD
通讯作者:
BECKE, AD
影响因子:
4.6
作者:
Frazier, Brenda A.;Wolczanski, Peter T.;Lobkovsky, Emil B.
通讯作者:
Lobkovsky, Emil B.