M. Calligaris, D. Minichelli, G. Nardin, L. Randaccio
{"title":"NN′-乙烯双(水杨基氨基)-乙基钴(III)的晶体结构和分子结构","authors":"M. Calligaris, D. Minichelli, G. Nardin, L. Randaccio","doi":"10.1039/J19710002720","DOIUrl":null,"url":null,"abstract":"The crystal and molecular structure of NN′-ethylenebis(salicylideneiminato)ethylcobalt(III), [EtCo(salen)], has been determined from three-dimensional X-ray data by the heavy-atom method. The crystals are monoclinic with a= 13·97, b= 7·39, c= 18·96 A, β= 127·2°, Z= 4, space group P21/c. Anisotropic least-squares refinement gave R 0·085 for 1762 independent reflexions. The crystals are built up by centrosymmetric dimeric units, dimerisation being achieved through the co-ordination of the cobalt atoms by an oxygen atom of the other [EtCo(salen)] unit (Co–O 2·342 ± 0·003 A).The co-ordination polyhedron of the cobalt atoms is represented by a distorted octahedron. The axial positions are occupied by an oxygen atom of the other Co(salen) unit and by the σ-bonded ethyl group (Co–C 1·990 ± 0·007 A); the four equatorial positions are occupied by the quadridentate salen ligand with Co–O 1·901 ± 0·005 and 1·935 ± 0·004 A and Co–N 1·886 and 1·880 ± 0·006 A. Some properties of salen-type ligands and the trans-influence in the octahedral cobalt complexes are discussed.","PeriodicalId":17321,"journal":{"name":"Journal of The Chemical Society A: Inorganic, Physical, Theoretical","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"10","resultStr":"{\"title\":\"Crystal and molecular structure of NN′-ethylenebis(salicylideneiminato)-ethylcobalt(III)\",\"authors\":\"M. Calligaris, D. Minichelli, G. Nardin, L. Randaccio\",\"doi\":\"10.1039/J19710002720\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The crystal and molecular structure of NN′-ethylenebis(salicylideneiminato)ethylcobalt(III), [EtCo(salen)], has been determined from three-dimensional X-ray data by the heavy-atom method. The crystals are monoclinic with a= 13·97, b= 7·39, c= 18·96 A, β= 127·2°, Z= 4, space group P21/c. Anisotropic least-squares refinement gave R 0·085 for 1762 independent reflexions. The crystals are built up by centrosymmetric dimeric units, dimerisation being achieved through the co-ordination of the cobalt atoms by an oxygen atom of the other [EtCo(salen)] unit (Co–O 2·342 ± 0·003 A).The co-ordination polyhedron of the cobalt atoms is represented by a distorted octahedron. The axial positions are occupied by an oxygen atom of the other Co(salen) unit and by the σ-bonded ethyl group (Co–C 1·990 ± 0·007 A); the four equatorial positions are occupied by the quadridentate salen ligand with Co–O 1·901 ± 0·005 and 1·935 ± 0·004 A and Co–N 1·886 and 1·880 ± 0·006 A. Some properties of salen-type ligands and the trans-influence in the octahedral cobalt complexes are discussed.\",\"PeriodicalId\":17321,\"journal\":{\"name\":\"Journal of The Chemical Society A: Inorganic, Physical, Theoretical\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1971-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"10\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of The Chemical Society A: Inorganic, Physical, Theoretical\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1039/J19710002720\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The Chemical Society A: Inorganic, Physical, Theoretical","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1039/J19710002720","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Crystal and molecular structure of NN′-ethylenebis(salicylideneiminato)-ethylcobalt(III)
The crystal and molecular structure of NN′-ethylenebis(salicylideneiminato)ethylcobalt(III), [EtCo(salen)], has been determined from three-dimensional X-ray data by the heavy-atom method. The crystals are monoclinic with a= 13·97, b= 7·39, c= 18·96 A, β= 127·2°, Z= 4, space group P21/c. Anisotropic least-squares refinement gave R 0·085 for 1762 independent reflexions. The crystals are built up by centrosymmetric dimeric units, dimerisation being achieved through the co-ordination of the cobalt atoms by an oxygen atom of the other [EtCo(salen)] unit (Co–O 2·342 ± 0·003 A).The co-ordination polyhedron of the cobalt atoms is represented by a distorted octahedron. The axial positions are occupied by an oxygen atom of the other Co(salen) unit and by the σ-bonded ethyl group (Co–C 1·990 ± 0·007 A); the four equatorial positions are occupied by the quadridentate salen ligand with Co–O 1·901 ± 0·005 and 1·935 ± 0·004 A and Co–N 1·886 and 1·880 ± 0·006 A. Some properties of salen-type ligands and the trans-influence in the octahedral cobalt complexes are discussed.