Coordination Chemistry of Polynitriles, Part XI. Influence of 4,4′-Bipyridine and Solvent on the Crystal and Molecular Structures of Alkaline Earth Pentacyanocyclopentadienides
The reaction of alkaline earth pentacyanocyclopentadienides with 4,4′-bipyridine in MeOH yielded undefined products of composition [M(PCC)<sub>2</sub>(Bipy)<sub>x</sub>(MeOH)<sub>y</sub>(H<sub>2</sub>O)<sub>z</sub>] (PCC = [C<sub>5<...
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MDPI AG
2022-11-01
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| Online Access: | https://www.mdpi.com/2624-8549/4/4/101 |
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| author | Patrick R. Nimax Karlheinz Sünkel |
| author_facet | Patrick R. Nimax Karlheinz Sünkel |
| author_sort | Patrick R. Nimax |
| collection | DOAJ |
| description | The reaction of alkaline earth pentacyanocyclopentadienides with 4,4′-bipyridine in MeOH yielded undefined products of composition [M(PCC)<sub>2</sub>(Bipy)<sub>x</sub>(MeOH)<sub>y</sub>(H<sub>2</sub>O)<sub>z</sub>] (PCC = [C<sub>5</sub>(CN)<sub>5</sub>]<sup>−</sup>). Recrystallization from MeOH, EtOH, or n-BuOH gave crystals of [Mg(H<sub>2</sub>O)<sub>4</sub>(4,4′-bipy)<sub>2</sub>](PCC)<sub>2</sub>∙2BuOH (<b>1</b>), [Ca(H<sub>2</sub>O)<sub>4</sub>(4,4′-bipy)<sub>2</sub>](PCC)<sub>2</sub>∙(4,4′-bipy) (<b>2</b>), [Sr(MeOH)<sub>8</sub>](PCC)<sub>2</sub>∙3(4,4′-bipy) (<b>3</b>), [Sr<sub>2</sub>(H<sub>2</sub>O)<sub>4</sub>(BuOH)<sub>4</sub>(PCC)<sub>2</sub>(µ-PCC)<sub>2</sub> (µ-4,4′-bipy)]∙4 (4,4′-bipy)∙0.29 (BuOH) (<b>4</b>), [Ba<sub>3</sub>(H<sub>2</sub>O)<sub>4</sub>(EtOH)<sub>10</sub> (PCC)<sub>2</sub>(µ-PCC)<sub>2</sub> (µ-4,4′-bipy)<sub>2</sub>(4,4′-bipy)](PCC)<sub>2</sub> ∙3(4,4′-bipy)∙2EtOH∙H<sub>2</sub>O (<b>5</b>) and [Ba<sub>4</sub>(H<sub>2</sub>O)<sub>8</sub>(BuOH)<sub>6</sub> (PCC)<sub>2</sub>(µ-PCC)<sub>6</sub> (4,4′-bipy)<sub>6</sub>]∙3(4,4′-bipy) (<b>6</b>). 4,4′-Bipyridine functions either as monodentate or bidentate ligand and is present in all cases except for <b>2</b> as lattice guest. While in compounds <b>1</b> and <b>2</b> only water is present as O-donor, the alcohol coordinates in the other compounds either exclusively (<b>3</b>) or together with water (<b>4</b>–<b>6</b>). The pentacyanocyclopentadienide does not coordinate in <b>1</b>–<b>3</b>, but is present as mono-, bi-, or tridentate ligand in <b>4</b>–<b>6</b>. In all compounds, a more or less complicated interplay of hydrogen bridges and π–π stacking is observed. |
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| spelling | doaj.art-05995deb67844e2f95120f9a557c24582023-11-24T13:58:42ZengMDPI AGChemistry2624-85492022-11-01441524154510.3390/chemistry4040101Coordination Chemistry of Polynitriles, Part XI. Influence of 4,4′-Bipyridine and Solvent on the Crystal and Molecular Structures of Alkaline Earth PentacyanocyclopentadienidesPatrick R. Nimax0Karlheinz Sünkel1Department of Chemistry, Ludwig Maximilians University Munich, Butenandtstr. 5-13, 81377 Munich, GermanyDepartment of Chemistry, Ludwig Maximilians University Munich, Butenandtstr. 5-13, 81377 Munich, GermanyThe reaction of alkaline earth pentacyanocyclopentadienides with 4,4′-bipyridine in MeOH yielded undefined products of composition [M(PCC)<sub>2</sub>(Bipy)<sub>x</sub>(MeOH)<sub>y</sub>(H<sub>2</sub>O)<sub>z</sub>] (PCC = [C<sub>5</sub>(CN)<sub>5</sub>]<sup>−</sup>). Recrystallization from MeOH, EtOH, or n-BuOH gave crystals of [Mg(H<sub>2</sub>O)<sub>4</sub>(4,4′-bipy)<sub>2</sub>](PCC)<sub>2</sub>∙2BuOH (<b>1</b>), [Ca(H<sub>2</sub>O)<sub>4</sub>(4,4′-bipy)<sub>2</sub>](PCC)<sub>2</sub>∙(4,4′-bipy) (<b>2</b>), [Sr(MeOH)<sub>8</sub>](PCC)<sub>2</sub>∙3(4,4′-bipy) (<b>3</b>), [Sr<sub>2</sub>(H<sub>2</sub>O)<sub>4</sub>(BuOH)<sub>4</sub>(PCC)<sub>2</sub>(µ-PCC)<sub>2</sub> (µ-4,4′-bipy)]∙4 (4,4′-bipy)∙0.29 (BuOH) (<b>4</b>), [Ba<sub>3</sub>(H<sub>2</sub>O)<sub>4</sub>(EtOH)<sub>10</sub> (PCC)<sub>2</sub>(µ-PCC)<sub>2</sub> (µ-4,4′-bipy)<sub>2</sub>(4,4′-bipy)](PCC)<sub>2</sub> ∙3(4,4′-bipy)∙2EtOH∙H<sub>2</sub>O (<b>5</b>) and [Ba<sub>4</sub>(H<sub>2</sub>O)<sub>8</sub>(BuOH)<sub>6</sub> (PCC)<sub>2</sub>(µ-PCC)<sub>6</sub> (4,4′-bipy)<sub>6</sub>]∙3(4,4′-bipy) (<b>6</b>). 4,4′-Bipyridine functions either as monodentate or bidentate ligand and is present in all cases except for <b>2</b> as lattice guest. While in compounds <b>1</b> and <b>2</b> only water is present as O-donor, the alcohol coordinates in the other compounds either exclusively (<b>3</b>) or together with water (<b>4</b>–<b>6</b>). The pentacyanocyclopentadienide does not coordinate in <b>1</b>–<b>3</b>, but is present as mono-, bi-, or tridentate ligand in <b>4</b>–<b>6</b>. In all compounds, a more or less complicated interplay of hydrogen bridges and π–π stacking is observed.https://www.mdpi.com/2624-8549/4/4/101polynitrile anions4,4′-bipyridinepentacyanocyclopentadienidealkaline-earth metalcoordination polymerhydrogen bonding |
| spellingShingle | Patrick R. Nimax Karlheinz Sünkel Coordination Chemistry of Polynitriles, Part XI. Influence of 4,4′-Bipyridine and Solvent on the Crystal and Molecular Structures of Alkaline Earth Pentacyanocyclopentadienides Chemistry polynitrile anions 4,4′-bipyridine pentacyanocyclopentadienide alkaline-earth metal coordination polymer hydrogen bonding |
| title | Coordination Chemistry of Polynitriles, Part XI. Influence of 4,4′-Bipyridine and Solvent on the Crystal and Molecular Structures of Alkaline Earth Pentacyanocyclopentadienides |
| title_full | Coordination Chemistry of Polynitriles, Part XI. Influence of 4,4′-Bipyridine and Solvent on the Crystal and Molecular Structures of Alkaline Earth Pentacyanocyclopentadienides |
| title_fullStr | Coordination Chemistry of Polynitriles, Part XI. Influence of 4,4′-Bipyridine and Solvent on the Crystal and Molecular Structures of Alkaline Earth Pentacyanocyclopentadienides |
| title_full_unstemmed | Coordination Chemistry of Polynitriles, Part XI. Influence of 4,4′-Bipyridine and Solvent on the Crystal and Molecular Structures of Alkaline Earth Pentacyanocyclopentadienides |
| title_short | Coordination Chemistry of Polynitriles, Part XI. Influence of 4,4′-Bipyridine and Solvent on the Crystal and Molecular Structures of Alkaline Earth Pentacyanocyclopentadienides |
| title_sort | coordination chemistry of polynitriles part xi influence of 4 4 bipyridine and solvent on the crystal and molecular structures of alkaline earth pentacyanocyclopentadienides |
| topic | polynitrile anions 4,4′-bipyridine pentacyanocyclopentadienide alkaline-earth metal coordination polymer hydrogen bonding |
| url | https://www.mdpi.com/2624-8549/4/4/101 |
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