Mononuclear and binuclear lanthanum(III) complexes of macrocyclic ligands derived from 2,6-diacetylpyridine

O. P. Pandey

doi:10.1016/S0277-5387(00)80948-1

Mononuclear and binuclear lanthanum(III) complexes of macrocyclic ligands derived from 2,6-diacetylpyridine

O. P. Pandey

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

28 Scopus citations

Abstract

Two novel series of complexes of types [La(DAPCH)X₂]X and [La(DAPTC)X₂]X (DAPCH = a potentially pentadentate ligand derived from 2,6-diacetylpyridine and carbohydrazide; DAPTC = a potentially tridentate ligand derived from 2,6-diacetylpyridine and thiocarbohydrazide; X = Cl, Br or NO₃) have been synthesized and characterized by elemental analyses, conductance measurements and IR spectral data. All these complexes contain terminal hydrazinic nitrogen atoms with an unshared electron pair and may take part in nucleophilic condensations. Therefore, the reactions of these complexes with 2,6-diacetylpyridine have also been studied which cause ring closure and formation of macrocyclic ligand complexes. Two types of cyclic products, viz. mononuclear [La(mac)X₂]X, [La(mac′)X₂]X and binuclear [La₂(mac)X₄]X₂, [La₂(mac′)X₄]X₂ (mac- = macrocyclic ligand derived from DAPCH and 2,6-diacetylpyridine; mac′ = macrocyclic ligand derived from DAPTC and 2,6-diacetylpyridine; X = Cl, Br or NO₃) have been isolated by carrying out the reactions by different methods. The IR spectra of these cyclic products are reported.

Original language	English
Pages (from-to)	1021-1025
Number of pages	5
Journal	Polyhedron
Volume	6
Issue number	5
DOIs	https://doi.org/10.1016/S0277-5387(00)80948-1
State	Published - 1987
Externally published	Yes

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title = "Mononuclear and binuclear lanthanum(III) complexes of macrocyclic ligands derived from 2,6-diacetylpyridine",

abstract = "Two novel series of complexes of types [La(DAPCH)X2]X and [La(DAPTC)X2]X (DAPCH = a potentially pentadentate ligand derived from 2,6-diacetylpyridine and carbohydrazide; DAPTC = a potentially tridentate ligand derived from 2,6-diacetylpyridine and thiocarbohydrazide; X = Cl, Br or NO3) have been synthesized and characterized by elemental analyses, conductance measurements and IR spectral data. All these complexes contain terminal hydrazinic nitrogen atoms with an unshared electron pair and may take part in nucleophilic condensations. Therefore, the reactions of these complexes with 2,6-diacetylpyridine have also been studied which cause ring closure and formation of macrocyclic ligand complexes. Two types of cyclic products, viz. mononuclear [La(mac)X2]X, [La(mac′)X2]X and binuclear [La2(mac)X4]X2, [La2(mac′)X4]X2 (mac- = macrocyclic ligand derived from DAPCH and 2,6-diacetylpyridine; mac′ = macrocyclic ligand derived from DAPTC and 2,6-diacetylpyridine; X = Cl, Br or NO3) have been isolated by carrying out the reactions by different methods. The IR spectra of these cyclic products are reported.",

author = "Pandey, \{O. P.\}",

year = "1987",

doi = "10.1016/S0277-5387(00)80948-1",

language = "English",

volume = "6",

pages = "1021--1025",

journal = "Polyhedron",

issn = "0277-5387",

publisher = "Elsevier Ltd.",

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T1 - Mononuclear and binuclear lanthanum(III) complexes of macrocyclic ligands derived from 2,6-diacetylpyridine

AU - Pandey, O. P.

PY - 1987

Y1 - 1987

N2 - Two novel series of complexes of types [La(DAPCH)X2]X and [La(DAPTC)X2]X (DAPCH = a potentially pentadentate ligand derived from 2,6-diacetylpyridine and carbohydrazide; DAPTC = a potentially tridentate ligand derived from 2,6-diacetylpyridine and thiocarbohydrazide; X = Cl, Br or NO3) have been synthesized and characterized by elemental analyses, conductance measurements and IR spectral data. All these complexes contain terminal hydrazinic nitrogen atoms with an unshared electron pair and may take part in nucleophilic condensations. Therefore, the reactions of these complexes with 2,6-diacetylpyridine have also been studied which cause ring closure and formation of macrocyclic ligand complexes. Two types of cyclic products, viz. mononuclear [La(mac)X2]X, [La(mac′)X2]X and binuclear [La2(mac)X4]X2, [La2(mac′)X4]X2 (mac- = macrocyclic ligand derived from DAPCH and 2,6-diacetylpyridine; mac′ = macrocyclic ligand derived from DAPTC and 2,6-diacetylpyridine; X = Cl, Br or NO3) have been isolated by carrying out the reactions by different methods. The IR spectra of these cyclic products are reported.

AB - Two novel series of complexes of types [La(DAPCH)X2]X and [La(DAPTC)X2]X (DAPCH = a potentially pentadentate ligand derived from 2,6-diacetylpyridine and carbohydrazide; DAPTC = a potentially tridentate ligand derived from 2,6-diacetylpyridine and thiocarbohydrazide; X = Cl, Br or NO3) have been synthesized and characterized by elemental analyses, conductance measurements and IR spectral data. All these complexes contain terminal hydrazinic nitrogen atoms with an unshared electron pair and may take part in nucleophilic condensations. Therefore, the reactions of these complexes with 2,6-diacetylpyridine have also been studied which cause ring closure and formation of macrocyclic ligand complexes. Two types of cyclic products, viz. mononuclear [La(mac)X2]X, [La(mac′)X2]X and binuclear [La2(mac)X4]X2, [La2(mac′)X4]X2 (mac- = macrocyclic ligand derived from DAPCH and 2,6-diacetylpyridine; mac′ = macrocyclic ligand derived from DAPTC and 2,6-diacetylpyridine; X = Cl, Br or NO3) have been isolated by carrying out the reactions by different methods. The IR spectra of these cyclic products are reported.

UR - https://www.scopus.com/pages/publications/3142599297

U2 - 10.1016/S0277-5387(00)80948-1

DO - 10.1016/S0277-5387(00)80948-1

M3 - Article

AN - SCOPUS:3142599297

SN - 0277-5387

VL - 6

SP - 1021

EP - 1025

JO - Polyhedron

JF - Polyhedron

IS - 5

ER -

Mononuclear and binuclear lanthanum(III) complexes of macrocyclic ligands derived from 2,6-diacetylpyridine

Abstract

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