Abstract
The mononuclear manganese(III) complexes [C5H10NH2][MnL2] [L2-=a substituted N-(2-hydroxybenzyl)glycinate (hbg2-) viz. 3,5-dibromo- (3,5-Br-hbg2-), 3,5-dichloro- (3,5-Cl-hbg2-), 3-methyl-5-chloro- (3,5-Me,Cl-hbg2-), 5-bromo- (5-Br-hbg2-), 5-chloro- (5-Cl-hbg2-), 5-nitro- (5-NO2-hbg2-) or N-(5-nitro-2-hydroxybenzyl)sarcosine (5-NO2-hbs2-)] have been synthesised by reaction of the appropriate ligand with manganese(II) perchlorate under ambient conditions in a 2:1 molar ratio using piperidine as base. The structures of three of these complexes, [C5H10NH2][Mn(3,5-Cl-hbg)2] (2), [C5H10NH2][Mn(5-NO2-hbg) 2] (6) and [C5H10NH2][Mn(5-NO2-hbs) 2] (7) have been elucidated by single-crystal X-ray crystallography and each displays two similar, independent [MnL2]- ions in the asymmetric unit linked via piperidinium cations through hydrogen bonding. The ligands co-ordinate in a facial tridentate fashion with the three donor atoms being the phenolate and carboxylate oxygens and the amine nitrogen. The geometry at the Mn centres is compressed rhombic octahedral consistent with a pseudo-Jahn-Teller compression along the Mn-O(phenolate) axis. Mean bond lengths are in the ranges 1.886-1.889 Å for the Mn-O(phenolate), 2.062-2.125 Å for the Mn-O(carboxylate) and 2.091-2.184 Å for the Mn-N(amine) distances. The magnetic susceptibility and electronic and IR spectroscopic data are discussed with reference to the crystal structures.
| Original language | English |
|---|---|
| Pages (from-to) | 228-236 |
| Number of pages | 9 |
| Journal | Inorganica Chimica Acta |
| Volume | 290 |
| Issue number | 2 |
| Publication status | Published - Jul 15 1999 |
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Keywords
- Crystal structures
- Glycine derivative complexes
- Manganese complexes
- Sarcosine derivative complexes
ASJC Scopus subject areas
- Biochemistry
- Inorganic Chemistry
- Physical and Theoretical Chemistry
- Materials Chemistry
Cite this
A series of heteroleptic complexes of the type fac-[MnIIIL2]- [H2L=derivatives of N-(2-hydroxybenzyl)glycine or N-(5-nitro-2-hydroxybenzyl)sarcosine] possessing unusual Mn(III) co-ordination spheres. / Shongwe, Musa S.; Mikuriya, Masahiro; Nukada, Ryoji; Ainscough, Eric W.; Brodie, Andrew M.; Waters, Joyce M.
In: Inorganica Chimica Acta, Vol. 290, No. 2, 15.07.1999, p. 228-236.Research output: Contribution to journal › Article
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TY - JOUR
T1 - A series of heteroleptic complexes of the type fac-[MnIIIL2]- [H2L=derivatives of N-(2-hydroxybenzyl)glycine or N-(5-nitro-2-hydroxybenzyl)sarcosine] possessing unusual Mn(III) co-ordination spheres
AU - Shongwe, Musa S.
AU - Mikuriya, Masahiro
AU - Nukada, Ryoji
AU - Ainscough, Eric W.
AU - Brodie, Andrew M.
AU - Waters, Joyce M.
PY - 1999/7/15
Y1 - 1999/7/15
N2 - The mononuclear manganese(III) complexes [C5H10NH2][MnL2] [L2-=a substituted N-(2-hydroxybenzyl)glycinate (hbg2-) viz. 3,5-dibromo- (3,5-Br-hbg2-), 3,5-dichloro- (3,5-Cl-hbg2-), 3-methyl-5-chloro- (3,5-Me,Cl-hbg2-), 5-bromo- (5-Br-hbg2-), 5-chloro- (5-Cl-hbg2-), 5-nitro- (5-NO2-hbg2-) or N-(5-nitro-2-hydroxybenzyl)sarcosine (5-NO2-hbs2-)] have been synthesised by reaction of the appropriate ligand with manganese(II) perchlorate under ambient conditions in a 2:1 molar ratio using piperidine as base. The structures of three of these complexes, [C5H10NH2][Mn(3,5-Cl-hbg)2] (2), [C5H10NH2][Mn(5-NO2-hbg) 2] (6) and [C5H10NH2][Mn(5-NO2-hbs) 2] (7) have been elucidated by single-crystal X-ray crystallography and each displays two similar, independent [MnL2]- ions in the asymmetric unit linked via piperidinium cations through hydrogen bonding. The ligands co-ordinate in a facial tridentate fashion with the three donor atoms being the phenolate and carboxylate oxygens and the amine nitrogen. The geometry at the Mn centres is compressed rhombic octahedral consistent with a pseudo-Jahn-Teller compression along the Mn-O(phenolate) axis. Mean bond lengths are in the ranges 1.886-1.889 Å for the Mn-O(phenolate), 2.062-2.125 Å for the Mn-O(carboxylate) and 2.091-2.184 Å for the Mn-N(amine) distances. The magnetic susceptibility and electronic and IR spectroscopic data are discussed with reference to the crystal structures.
AB - The mononuclear manganese(III) complexes [C5H10NH2][MnL2] [L2-=a substituted N-(2-hydroxybenzyl)glycinate (hbg2-) viz. 3,5-dibromo- (3,5-Br-hbg2-), 3,5-dichloro- (3,5-Cl-hbg2-), 3-methyl-5-chloro- (3,5-Me,Cl-hbg2-), 5-bromo- (5-Br-hbg2-), 5-chloro- (5-Cl-hbg2-), 5-nitro- (5-NO2-hbg2-) or N-(5-nitro-2-hydroxybenzyl)sarcosine (5-NO2-hbs2-)] have been synthesised by reaction of the appropriate ligand with manganese(II) perchlorate under ambient conditions in a 2:1 molar ratio using piperidine as base. The structures of three of these complexes, [C5H10NH2][Mn(3,5-Cl-hbg)2] (2), [C5H10NH2][Mn(5-NO2-hbg) 2] (6) and [C5H10NH2][Mn(5-NO2-hbs) 2] (7) have been elucidated by single-crystal X-ray crystallography and each displays two similar, independent [MnL2]- ions in the asymmetric unit linked via piperidinium cations through hydrogen bonding. The ligands co-ordinate in a facial tridentate fashion with the three donor atoms being the phenolate and carboxylate oxygens and the amine nitrogen. The geometry at the Mn centres is compressed rhombic octahedral consistent with a pseudo-Jahn-Teller compression along the Mn-O(phenolate) axis. Mean bond lengths are in the ranges 1.886-1.889 Å for the Mn-O(phenolate), 2.062-2.125 Å for the Mn-O(carboxylate) and 2.091-2.184 Å for the Mn-N(amine) distances. The magnetic susceptibility and electronic and IR spectroscopic data are discussed with reference to the crystal structures.
KW - Crystal structures
KW - Glycine derivative complexes
KW - Manganese complexes
KW - Sarcosine derivative complexes
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UR - http://www.scopus.com/inward/citedby.url?scp=0000797384&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0000797384
VL - 290
SP - 228
EP - 236
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
SN - 0020-1693
IS - 2
ER -