The transient template effect

Chromium(III)-directed syntheses of metal-free macrocyclic ligands and crystal structure of 1,11-bis(2′-hydroxyethyl)-4,8;12,16;17,21-trinitrilo-1,2,10,11-tetra- azacyclohenicosa-2,4,6,9,12,14,18,20-octaene hydrochloride tetrahydrate

Lap Yan Chung, Edwin C. Constable, Adrian R. Dale, Muhammed S. Khan, Michael C. Liptrot, Jack Lewis, Paul R. Raithby

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A range of metal-free quinquedentate macrocyclic ligands incorporating 2,2′-bipyridine or 1,10-phenanthroline donor groups has been prepared by the use of a chromium(III) transient template. The transient template effect is shown to be due to pH effects resulting from the presence of chromium(III) complexes in aqueous solution, rather than a process in which the open-chain ligands become co-ordinated to the metal centre. The crystal and molecular structure of a free macrocyclic ligand is reported, as is the preparation of some chromium(III) complexes of open-chain and macrocyclic complexes.

Original languageEnglish
Pages (from-to)1397-1404
Number of pages8
JournalJournal of the Chemical Society, Dalton Transactions
Issue number4
DOIs
Publication statusPublished - 1990

Fingerprint

Chromium
Crystal structure
Metals
Ligands
pH effects
Molecular structure

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

@article{619c06c137e747c8b1060810b5c3d394,
title = "The transient template effect: Chromium(III)-directed syntheses of metal-free macrocyclic ligands and crystal structure of 1,11-bis(2′-hydroxyethyl)-4,8;12,16;17,21-trinitrilo-1,2,10,11-tetra- azacyclohenicosa-2,4,6,9,12,14,18,20-octaene hydrochloride tetrahydrate",
abstract = "A range of metal-free quinquedentate macrocyclic ligands incorporating 2,2′-bipyridine or 1,10-phenanthroline donor groups has been prepared by the use of a chromium(III) transient template. The transient template effect is shown to be due to pH effects resulting from the presence of chromium(III) complexes in aqueous solution, rather than a process in which the open-chain ligands become co-ordinated to the metal centre. The crystal and molecular structure of a free macrocyclic ligand is reported, as is the preparation of some chromium(III) complexes of open-chain and macrocyclic complexes.",
author = "Chung, {Lap Yan} and Constable, {Edwin C.} and Dale, {Adrian R.} and Khan, {Muhammed S.} and Liptrot, {Michael C.} and Jack Lewis and Raithby, {Paul R.}",
year = "1990",
doi = "10.1039/DT9900001397",
language = "English",
pages = "1397--1404",
journal = "Dalton Transactions",
issn = "0300-9246",
publisher = "Royal Society of Chemistry",
number = "4",

}

TY - JOUR

T1 - The transient template effect

T2 - Chromium(III)-directed syntheses of metal-free macrocyclic ligands and crystal structure of 1,11-bis(2′-hydroxyethyl)-4,8;12,16;17,21-trinitrilo-1,2,10,11-tetra- azacyclohenicosa-2,4,6,9,12,14,18,20-octaene hydrochloride tetrahydrate

AU - Chung, Lap Yan

AU - Constable, Edwin C.

AU - Dale, Adrian R.

AU - Khan, Muhammed S.

AU - Liptrot, Michael C.

AU - Lewis, Jack

AU - Raithby, Paul R.

PY - 1990

Y1 - 1990

N2 - A range of metal-free quinquedentate macrocyclic ligands incorporating 2,2′-bipyridine or 1,10-phenanthroline donor groups has been prepared by the use of a chromium(III) transient template. The transient template effect is shown to be due to pH effects resulting from the presence of chromium(III) complexes in aqueous solution, rather than a process in which the open-chain ligands become co-ordinated to the metal centre. The crystal and molecular structure of a free macrocyclic ligand is reported, as is the preparation of some chromium(III) complexes of open-chain and macrocyclic complexes.

AB - A range of metal-free quinquedentate macrocyclic ligands incorporating 2,2′-bipyridine or 1,10-phenanthroline donor groups has been prepared by the use of a chromium(III) transient template. The transient template effect is shown to be due to pH effects resulting from the presence of chromium(III) complexes in aqueous solution, rather than a process in which the open-chain ligands become co-ordinated to the metal centre. The crystal and molecular structure of a free macrocyclic ligand is reported, as is the preparation of some chromium(III) complexes of open-chain and macrocyclic complexes.

UR - http://www.scopus.com/inward/record.url?scp=37049080801&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=37049080801&partnerID=8YFLogxK

U2 - 10.1039/DT9900001397

DO - 10.1039/DT9900001397

M3 - Article

SP - 1397

EP - 1404

JO - Dalton Transactions

JF - Dalton Transactions

SN - 0300-9246

IS - 4

ER -