How to force a classical chelating ligand to a metal non-chelating bridge: the observation of a rare coordination mode of diethanolamine in the 1D complex {[Cu-2(Piv)(4)(H(3)tBuDea)](Piv)}(n)
Nesterova, OV; Kirillova, MV; Guedes da Silva, MFC; Boca, R; Pombeiro, AJL
| HERO ID | 4660932 |
|---|---|
| In Press | No |
| Year | 2014 |
| Title | How to force a classical chelating ligand to a metal non-chelating bridge: the observation of a rare coordination mode of diethanolamine in the 1D complex {[Cu-2(Piv)(4)(H(3)tBuDea)](Piv)}(n) |
| Authors | Nesterova, OV; Kirillova, MV; Guedes da Silva, MFC; Boca, R; Pombeiro, AJL |
| Journal | CrystEngComm |
| Volume | 16 |
| Issue | 5 |
| Page Numbers | 775-783 |
| Abstract | The novel chain coordination polymer {[Cu-2(Piv)(4)(H(3)tBuDea)](Piv)}(n) (1) has been prepared through the self-assembly reaction of copper(II) nitrate with pivalic acid (HPiv) and N-tert-butyldiethanolamine (H(2)tBuDea) in acetonitrile solution. Crystallographic analysis revealed the extremely rare non-chelating bridging coordination mode of diethanolamine ligand in 1, observed for the first time in transition metal complexes, as well as in complexes of diethanolamine having a non-coordinating aliphatic group at the N atom. Possible reasons for such a coordination and analysis of the main coordination modes of diethanolamine-based ligands are discussed. Variable-temperature (1.8-300 K) magnetic susceptibility measurements showed that 1 represents a rare example of dicopper(II) tetracarboxylate that is a diamagnetic solid at room temperature. This behaviour is compared with literature examples and discussed on the basis of DFT calculations. Furthermore, 1 acts as an efficient catalyst for the mild hydrocarboxylation of linear and cyclic C-5-C-8 alkanes into the corresponding carboxylic acids. |
| Doi | 10.1039/c3ce41657g |
| Wosid | WOS:000328952000006 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |