Mixed valency in a neutral 1D Fe-chloranilate coordination polymer,Dalton Transactions

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Mixed valency in a neutral 1D Fe-chloranilate coordination polymer
Dalton Transactions ( IF 3.5 ) Pub Date : 2022-06-07 , DOI: 10.1039/d1dt04368d
Katelyn M Clutterbuck ₁ , Brendan F Abrahams ₁ , Timothy A Hudson ₁ , Martin P van Koeverden ₁

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The syntheses and structures of a pair of neutral one-dimensional (1D) Fe-anilate based coordination polymers, Fe(Fan)(4,4′-bipy)₂ (Fanⁿ⁻ = deprotonated 3,6-difluoro-2,5-dihydroxy-1,4-benzoquinone; 4,4′-bipy = 4,4′-bipyridine) and Fe(Clan)(OPPh₃)₂ (Clanⁿ⁻ = deprotonated 3,6-dichloro-2,5-dihydroxy-1,4-benzoquinone; OPPh₃ = triphenylphosphine oxide), are reported. In the case of Fe(Fan)(4,4′-bipy)₂, the Fe centre is in the +2 oxidation state and the Fan ligand is present in its quinoidal, dianionic form. In contrast, the structurally similar Fe(Clan)(OPPh₃)₂ chain contains Fe centres and chloranilate ligands in oxidation states close to +3 and −3 respectively at low temperature. It is suggested that intrachain π–π interactions aid electron transfer from the Fe centres to the bridging ligands.

中文翻译：

中性一维铁-氯苯胺配位聚合物中的混合价

一对中性一维 (1D) Fe-苯胺基配位聚合物 Fe(Fan)(4,4'-bipy) ₂ (Fan ^{n -} = deprotonated 3,6-difluoro-2,5 ) 的合成和结构-dihydroxy-1,4-benzoquinone；4,4'-bipy = 4,4'-bipyridine) 和 Fe(Clan)(OPPh ₃ ) ₂ (Clan ^{n -} = 去质子化的 3,6-dichloro-2,5-dihydroxy报道了-1,4-苯醌；OPPh ₃ = 三苯基氧化膦)。在 Fe(Fan)(4,4'-bipy) ₂的情况下，Fe 中心处于 +2 氧化态，Fan 配体以其醌型双阴离子形式存在。相反，结构相似的 Fe(Clan)(OPPh ₃ ) ₂链包含在低温下分别接近+3和-3氧化态的Fe中心和氯苯胺配体。建议链内 π-π 相互作用有助于电子从 Fe 中心转移到桥接配体。

更新日期：2022-06-07

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