Some tetrahydroborate derivatives of aluminium: Crystal structures of dimethylaluminium tetrahydroborate and the alpha and beta phases of aluminium tris(tetrahydroborate) at low temperature
The structures of several aluminium tetrahydroborates have been investigated, primarily by X-ray diffraction of single crystals at low temperatures. The structure of dimethylaluminium tetrahydroborate has been shown to consist of helical polymeric chains in which Me2Al and BH4 units alternate. The B...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal article |
| Published: |
1997
|
| _version_ | 1826272613232541696 |
|---|---|
| author | Aldridge, S Blake, A Downs, A Gould, R Parsons, S Pulham, C |
| author_facet | Aldridge, S Blake, A Downs, A Gould, R Parsons, S Pulham, C |
| author_sort | Aldridge, S |
| collection | OXFORD |
| description | The structures of several aluminium tetrahydroborates have been investigated, primarily by X-ray diffraction of single crystals at low temperatures. The structure of dimethylaluminium tetrahydroborate has been shown to consist of helical polymeric chains in which Me2Al and BH4 units alternate. The BH4 groups exhibit bidentate ligation with respect to each of the adjacent metal atoms in a manner reminiscent of [MeZnBH4] and Be(BH4)2. Solid aluminium tris(tetrahydroborate) exists in two phases with a transition temperature in the range 180-195 K. Each phase is made up of discrete Al(BH4)3 units in which the angle between AlB2 and Al(μ-H)2 B planes is close to 90° and which conform within the limits of experimental error to D3h symmetry; in the α phase these molecular units are disposed around a 21 crystallographic screw axis. |
| first_indexed | 2024-03-06T22:15:20Z |
| format | Journal article |
| id | oxford-uuid:5334e923-ee12-4158-abe9-b5cdb81dabce |
| institution | University of Oxford |
| last_indexed | 2024-03-06T22:15:20Z |
| publishDate | 1997 |
| record_format | dspace |
| spelling | oxford-uuid:5334e923-ee12-4158-abe9-b5cdb81dabce2022-03-26T16:30:07ZSome tetrahydroborate derivatives of aluminium: Crystal structures of dimethylaluminium tetrahydroborate and the alpha and beta phases of aluminium tris(tetrahydroborate) at low temperatureJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:5334e923-ee12-4158-abe9-b5cdb81dabceSymplectic Elements at Oxford1997Aldridge, SBlake, ADowns, AGould, RParsons, SPulham, CThe structures of several aluminium tetrahydroborates have been investigated, primarily by X-ray diffraction of single crystals at low temperatures. The structure of dimethylaluminium tetrahydroborate has been shown to consist of helical polymeric chains in which Me2Al and BH4 units alternate. The BH4 groups exhibit bidentate ligation with respect to each of the adjacent metal atoms in a manner reminiscent of [MeZnBH4] and Be(BH4)2. Solid aluminium tris(tetrahydroborate) exists in two phases with a transition temperature in the range 180-195 K. Each phase is made up of discrete Al(BH4)3 units in which the angle between AlB2 and Al(μ-H)2 B planes is close to 90° and which conform within the limits of experimental error to D3h symmetry; in the α phase these molecular units are disposed around a 21 crystallographic screw axis. |
| spellingShingle | Aldridge, S Blake, A Downs, A Gould, R Parsons, S Pulham, C Some tetrahydroborate derivatives of aluminium: Crystal structures of dimethylaluminium tetrahydroborate and the alpha and beta phases of aluminium tris(tetrahydroborate) at low temperature |
| title | Some tetrahydroborate derivatives of aluminium: Crystal structures of dimethylaluminium tetrahydroborate and the alpha and beta phases of aluminium tris(tetrahydroborate) at low temperature |
| title_full | Some tetrahydroborate derivatives of aluminium: Crystal structures of dimethylaluminium tetrahydroborate and the alpha and beta phases of aluminium tris(tetrahydroborate) at low temperature |
| title_fullStr | Some tetrahydroborate derivatives of aluminium: Crystal structures of dimethylaluminium tetrahydroborate and the alpha and beta phases of aluminium tris(tetrahydroborate) at low temperature |
| title_full_unstemmed | Some tetrahydroborate derivatives of aluminium: Crystal structures of dimethylaluminium tetrahydroborate and the alpha and beta phases of aluminium tris(tetrahydroborate) at low temperature |
| title_short | Some tetrahydroborate derivatives of aluminium: Crystal structures of dimethylaluminium tetrahydroborate and the alpha and beta phases of aluminium tris(tetrahydroborate) at low temperature |
| title_sort | some tetrahydroborate derivatives of aluminium crystal structures of dimethylaluminium tetrahydroborate and the alpha and beta phases of aluminium tris tetrahydroborate at low temperature |
| work_keys_str_mv | AT aldridges sometetrahydroboratederivativesofaluminiumcrystalstructuresofdimethylaluminiumtetrahydroborateandthealphaandbetaphasesofaluminiumtristetrahydroborateatlowtemperature AT blakea sometetrahydroboratederivativesofaluminiumcrystalstructuresofdimethylaluminiumtetrahydroborateandthealphaandbetaphasesofaluminiumtristetrahydroborateatlowtemperature AT downsa sometetrahydroboratederivativesofaluminiumcrystalstructuresofdimethylaluminiumtetrahydroborateandthealphaandbetaphasesofaluminiumtristetrahydroborateatlowtemperature AT gouldr sometetrahydroboratederivativesofaluminiumcrystalstructuresofdimethylaluminiumtetrahydroborateandthealphaandbetaphasesofaluminiumtristetrahydroborateatlowtemperature AT parsonss sometetrahydroboratederivativesofaluminiumcrystalstructuresofdimethylaluminiumtetrahydroborateandthealphaandbetaphasesofaluminiumtristetrahydroborateatlowtemperature AT pulhamc sometetrahydroboratederivativesofaluminiumcrystalstructuresofdimethylaluminiumtetrahydroborateandthealphaandbetaphasesofaluminiumtristetrahydroborateatlowtemperature |