Brendan F Abrahams, Richard Robson, Christopher J Commons
{"title":"碱式醋酸铁（III）与醋酸配体的聚合物形式。","authors":"Brendan F Abrahams, Richard Robson, Christopher J Commons","doi":"10.1107/S2053229624010672","DOIUrl":null,"url":null,"abstract":"<p><p>A new crystalline compound, catena-poly[hexa-μ-acetato-(acetic acid)-μ<sub>3</sub>-oxido-triangulo-triiron(III)]-μ-acetato], [Fe<sub>3</sub>(C<sub>2</sub>H<sub>3</sub>O<sub>2</sub>)<sub>7</sub>O(C<sub>2</sub>H<sub>4</sub>O<sub>2</sub>)]<sub>n</sub>, incorporating the basic ferric acetate unit, has been obtained from an acetic anhydride solution of hydrated iron(III) nitrate. The crystals have the composition Fe<sub>3</sub>O(OAc)<sub>7</sub>(HOAc) (HOAc is acetic acid) and include the well-known [Fe<sub>3</sub>O(OAc)<sub>6</sub>]<sup>+</sup> unit, in which the Fe<sup>III</sup> centres are linked to a central coplanar μ<sub>3</sub>-oxido ligand. Acetate ions provide bridges between pairs of Fe<sup>III</sup> centres. These individual [Fe<sub>3</sub>O(OAc)<sub>6</sub>]<sup>+</sup> units are linked by additional bridging acetate anions to form zigzag chains. The bridging acetate ions coordinate to a position trans to the oxido group on two of the Fe<sup>III</sup> centres. Remarkably, the trans site on the third Fe<sup>III</sup> centre is occupied by the carbonyl group of an acetic acid molecule. This is the first reported case of an acetic acid molecule coordinating to an Fe<sup>III</sup> centre. Not surprisingly, the acetic acid molecule is only weakly coordinating, resulting in a short Fe-O(oxido) bond trans to the carbonyl group. The trans influence apparent in this structure provides an interesting contrast with the structurally similar Mn<sup>III</sup> analogue, in which the corresponding pair of trans bonds are both elongated because of the Jahn-Teller effect.</p>","PeriodicalId":7115,"journal":{"name":"Acta Crystallographica Section C Structural Chemistry","volume":" ","pages":"787-791"},"PeriodicalIF":0.7000,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A polymeric form of basic iron(III) acetate with an acetic acid ligand.\",\"authors\":\"Brendan F Abrahams, Richard Robson, Christopher J Commons\",\"doi\":\"10.1107/S2053229624010672\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>A new crystalline compound, catena-poly[hexa-μ-acetato-(acetic acid)-μ<sub>3</sub>-oxido-triangulo-triiron(III)]-μ-acetato], [Fe<sub>3</sub>(C<sub>2</sub>H<sub>3</sub>O<sub>2</sub>)<sub>7</sub>O(C<sub>2</sub>H<sub>4</sub>O<sub>2</sub>)]<sub>n</sub>, incorporating the basic ferric acetate unit, has been obtained from an acetic anhydride solution of hydrated iron(III) nitrate. The crystals have the composition Fe<sub>3</sub>O(OAc)<sub>7</sub>(HOAc) (HOAc is acetic acid) and include the well-known [Fe<sub>3</sub>O(OAc)<sub>6</sub>]<sup>+</sup> unit, in which the Fe<sup>III</sup> centres are linked to a central coplanar μ<sub>3</sub>-oxido ligand. Acetate ions provide bridges between pairs of Fe<sup>III</sup> centres. These individual [Fe<sub>3</sub>O(OAc)<sub>6</sub>]<sup>+</sup> units are linked by additional bridging acetate anions to form zigzag chains. The bridging acetate ions coordinate to a position trans to the oxido group on two of the Fe<sup>III</sup> centres. Remarkably, the trans site on the third Fe<sup>III</sup> centre is occupied by the carbonyl group of an acetic acid molecule. This is the first reported case of an acetic acid molecule coordinating to an Fe<sup>III</sup> centre. Not surprisingly, the acetic acid molecule is only weakly coordinating, resulting in a short Fe-O(oxido) bond trans to the carbonyl group. The trans influence apparent in this structure provides an interesting contrast with the structurally similar Mn<sup>III</sup> analogue, in which the corresponding pair of trans bonds are both elongated because of the Jahn-Teller effect.</p>\",\"PeriodicalId\":7115,\"journal\":{\"name\":\"Acta Crystallographica Section C Structural Chemistry\",\"volume\":\" \",\"pages\":\"787-791\"},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2024-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acta Crystallographica Section C Structural Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.1107/S2053229624010672\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2024/11/20 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Crystallographica Section C Structural Chemistry","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1107/S2053229624010672","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/11/20 0:00:00","PubModel":"Epub","JCR":"Q4","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
A polymeric form of basic iron(III) acetate with an acetic acid ligand.
A new crystalline compound, catena-poly[hexa-μ-acetato-(acetic acid)-μ3-oxido-triangulo-triiron(III)]-μ-acetato], [Fe3(C2H3O2)7O(C2H4O2)]n, incorporating the basic ferric acetate unit, has been obtained from an acetic anhydride solution of hydrated iron(III) nitrate. The crystals have the composition Fe3O(OAc)7(HOAc) (HOAc is acetic acid) and include the well-known [Fe3O(OAc)6]+ unit, in which the FeIII centres are linked to a central coplanar μ3-oxido ligand. Acetate ions provide bridges between pairs of FeIII centres. These individual [Fe3O(OAc)6]+ units are linked by additional bridging acetate anions to form zigzag chains. The bridging acetate ions coordinate to a position trans to the oxido group on two of the FeIII centres. Remarkably, the trans site on the third FeIII centre is occupied by the carbonyl group of an acetic acid molecule. This is the first reported case of an acetic acid molecule coordinating to an FeIII centre. Not surprisingly, the acetic acid molecule is only weakly coordinating, resulting in a short Fe-O(oxido) bond trans to the carbonyl group. The trans influence apparent in this structure provides an interesting contrast with the structurally similar MnIII analogue, in which the corresponding pair of trans bonds are both elongated because of the Jahn-Teller effect.
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Acta Crystallographica Section C: Structural Chemistry is continuing its transition to a journal that publishes exciting science with structural content, in particular, important results relating to the chemical sciences. Section C is the journal of choice for the rapid publication of articles that highlight interesting research facilitated by the determination, calculation or analysis of structures of any type, other than macromolecular structures. Articles that emphasize the science and the outcomes that were enabled by the study are particularly welcomed. Authors are encouraged to include mainstream science in their papers, thereby producing manuscripts that are substantial scientific well-rounded contributions that appeal to a broad community of readers and increase the profile of the authors.
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