Copper(II) complexes of asymmetrical and symmetrical acyclic pentadentate (N5) mono-Schiff-base ligands. The X-ray structure of [Cu(ppe-py)](ClO4)2

Hassan Keypour; Sadegh Salehzadeh; Robin G. Pritchard; Richard V. Parish

doi:10.1023/A:1020357327379

Copper(II) complexes of asymmetrical and symmetrical acyclic pentadentate (N5) mono-Schiff-base ligands. The X-ray structure of [Cu(ppe-py)](ClO4)2

Hassan Keypour, Sadegh Salehzadeh, Robin G. Pritchard, Richard V. Parish

Research output: Contribution to journal › Article › peer-review

Abstract

In the presence of copper(II) ion, two asymmetrical tripodal tetraamine ligands N{(CH2)3NH2} {(CH2)2NH2}2 (pee), N{(CH2)3NH2}2 {(CH2)2NH2} (ppe) and one symmetrical ligand, N{(CH2)3NH2}3 (tpt), were condensed with 2-acetylpyridine. In EtOH-H2O solutions the reaction stops after the first condensation stage, and complexes of acyclic pentadentate(N5) mono-Schiff-base ligands were obtained. With asymmetrical tetraamines there are two possible condensation sites: the primary amine of the propylene, or the ethylene chain. The X-ray structure analysis of one complex, [Cu(ppe-py)](ClO4)2, indicates that condensation with 2-acetylpyridine in this case occurs at the propylene chain and the geometry around the copper ion is trigonal-bipyramidal.

Original language	English
Pages (from-to)	720-723
Number of pages	3
Journal	Transition Metal Chemistry
Volume	27
Issue number	7
DOIs	https://doi.org/10.1023/A:1020357327379
Publication status	Published - Oct 2002

Keywords

Schiff bases Role: SPN (Synthetic preparation), PREP (Preparation) (copper complexes, sym. acyclic pentadentate N5 Schiff bases; prepn. of); Crystal structure; Molecular structure (of copper sym. acyclic pentadentate N5 Schiff base complex)

Access to Document

10.1023/A:1020357327379

Cite this

@article{d52e53a7e0b54ba8a1d8251a7d7bb52e,

title = "Copper(II) complexes of asymmetrical and symmetrical acyclic pentadentate (N5) mono-Schiff-base ligands. The X-ray structure of [Cu(ppe-py)](ClO4)2",

abstract = "In the presence of copper(II) ion, two asymmetrical tripodal tetraamine ligands N{(CH2)3NH2} {(CH2)2NH2}2 (pee), N{(CH2)3NH2}2 {(CH2)2NH2} (ppe) and one symmetrical ligand, N{(CH2)3NH2}3 (tpt), were condensed with 2-acetylpyridine. In EtOH-H2O solutions the reaction stops after the first condensation stage, and complexes of acyclic pentadentate(N5) mono-Schiff-base ligands were obtained. With asymmetrical tetraamines there are two possible condensation sites: the primary amine of the propylene, or the ethylene chain. The X-ray structure analysis of one complex, [Cu(ppe-py)](ClO4)2, indicates that condensation with 2-acetylpyridine in this case occurs at the propylene chain and the geometry around the copper ion is trigonal-bipyramidal.",

keywords = "Schiff bases Role: SPN (Synthetic preparation), PREP (Preparation) (copper complexes, sym. acyclic pentadentate N5 Schiff bases; prepn. of); Crystal structure; Molecular structure (of copper sym. acyclic pentadentate N5 Schiff base complex)",

author = "Hassan Keypour and Sadegh Salehzadeh and Pritchard, {Robin G.} and Parish, {Richard V.}",

year = "2002",

month = oct,

doi = "10.1023/A:1020357327379",

language = "English",

volume = "27",

pages = "720--723",

journal = "Transition Metal Chemistry",

issn = "0340-4285",

publisher = "Springer Nature",

number = "7",

}

TY - JOUR

T1 - Copper(II) complexes of asymmetrical and symmetrical acyclic pentadentate (N5) mono-Schiff-base ligands. The X-ray structure of [Cu(ppe-py)](ClO4)2

AU - Keypour, Hassan

AU - Salehzadeh, Sadegh

AU - Pritchard, Robin G.

AU - Parish, Richard V.

PY - 2002/10

Y1 - 2002/10

N2 - In the presence of copper(II) ion, two asymmetrical tripodal tetraamine ligands N{(CH2)3NH2} {(CH2)2NH2}2 (pee), N{(CH2)3NH2}2 {(CH2)2NH2} (ppe) and one symmetrical ligand, N{(CH2)3NH2}3 (tpt), were condensed with 2-acetylpyridine. In EtOH-H2O solutions the reaction stops after the first condensation stage, and complexes of acyclic pentadentate(N5) mono-Schiff-base ligands were obtained. With asymmetrical tetraamines there are two possible condensation sites: the primary amine of the propylene, or the ethylene chain. The X-ray structure analysis of one complex, [Cu(ppe-py)](ClO4)2, indicates that condensation with 2-acetylpyridine in this case occurs at the propylene chain and the geometry around the copper ion is trigonal-bipyramidal.

AB - In the presence of copper(II) ion, two asymmetrical tripodal tetraamine ligands N{(CH2)3NH2} {(CH2)2NH2}2 (pee), N{(CH2)3NH2}2 {(CH2)2NH2} (ppe) and one symmetrical ligand, N{(CH2)3NH2}3 (tpt), were condensed with 2-acetylpyridine. In EtOH-H2O solutions the reaction stops after the first condensation stage, and complexes of acyclic pentadentate(N5) mono-Schiff-base ligands were obtained. With asymmetrical tetraamines there are two possible condensation sites: the primary amine of the propylene, or the ethylene chain. The X-ray structure analysis of one complex, [Cu(ppe-py)](ClO4)2, indicates that condensation with 2-acetylpyridine in this case occurs at the propylene chain and the geometry around the copper ion is trigonal-bipyramidal.

KW - Schiff bases Role: SPN (Synthetic preparation), PREP (Preparation) (copper complexes, sym. acyclic pentadentate N5 Schiff bases; prepn. of); Crystal structure; Molecular structure (of copper sym. acyclic pentadentate N5 Schiff base complex)

U2 - 10.1023/A:1020357327379

DO - 10.1023/A:1020357327379

M3 - Article

VL - 27

SP - 720

EP - 723

JO - Transition Metal Chemistry

JF - Transition Metal Chemistry

SN - 0340-4285

IS - 7

ER -

Copper(II) complexes of asymmetrical and symmetrical acyclic pentadentate (N5) mono-Schiff-base ligands. The X-ray structure of [Cu(ppe-py)](ClO4)2

Abstract

Keywords

Access to Document

Fingerprint

Cite this