New Organometallic and Coordination Chemistry Routes Towards Unsupported and Silica-Supported Bismuth-Based Oxide-Type Materials

1998 ◽  
Vol 547 ◽  
Author(s):  
M. Devillers ◽  
S. Lebrun ◽  
O. Tirions ◽  
H. Wullens
Keyword(s):  
Coordination Chemistry ◽  
Organic Solvents ◽  
Organometallic Compounds ◽  
Bismuth Molybdates ◽  
Triethylenetetraaminehexaacetic Acid

AbstractCoordination and organometallic compounds containing bismuth, lanthanum or molybdenum are used as precursors for the preparation of unsupported or silica-supported Bi-based oxides. Bismuth (III) and lanthanum (III) polyaminocarboxylates, and more specifically homo- and heteropolymetallic complexes of triethylenetetraaminehexaacetic acid (H6ttha) are shown to constitute adequate precursors for the formation of mixed Bi2-xLaxO3 oxides at moderate temperatures. Silica-supported bismuth molybdates are obtained from impregnation or combined impregnation-deposition procedures involving Bi ß-diketonates, carboxylates or mixed acetate-Nmethylimidazole Bi complexes, in association with molybdenyl acetylacetonate or heteroleptic carbonyl-pyridine Mo complexes, either dissolved or dispersed in various organic solvents.

Nomenclature of Organometallic Compounds of the Transition Elements (IUPAC Recommendations 1999)

1999 ◽  
Vol 71 (8) ◽  
pp. 1557-1585 ◽  
Author(s):  
A. Salzer
Keyword(s):  
Organic Chemistry ◽  
Coordination Chemistry ◽  
Valence Electron ◽  
Organic Ligand ◽  
Organometallic Compounds ◽  
Central Metal Atom ◽  
Central Metal ◽  
Transition Elements ◽  
Multiple Bonds ◽  
Single Bonds

Organometallic compounds are defined as containing at least one metal-carbon bond between an organic molecule, ion, or radical and a metal. Organometallic nomenclature therefore usually combines the nomenclature of organic chemisty and that of coordination chemistry. Provisional rules outlining nomenclature for such compounds are found both in Nomenclature of Organic Chemistry, 1979 and in Nomenclature of Inorganic Chemistry, 1990This document describes the nomenclature for organometallic compounds of the transition elements, that is compounds with metal-carbon single bonds, metal-carbon multiple bonds as well as complexes with unsaturated molecules (metal-p-complexes).Organometallic compounds are considered to be produced by addition reactions and so they are named on an addition principle. The name therefore is built around the central metal atom name. Organic ligand names are derived according to the rules of organic chemistry with appropriate endings to indicate the different bonding modes. To designate the points of attachment of ligands in more complicated structures, the h, k, and m-notations are used. The final section deals with the abbreviated nomenclature for metallocenes and their derivatives.ContentsIntroduction Systems of Nomenclature2.1 Binary type nomenclature 2.2 Substitutive nomenlcature 2.3 Coordination nomenclature Coordination Nomenclature3.1 General definitions of coordination chemistry 3.2 Oxidation numbers and net charges 3.3 Formulae and names for coordination compounds Nomenclature for Organometallic Compounds of Transition Metals 4.1 Valence-electron-numbers and the 18-valence-electron-rule 4.2 Ligand names 4.2.1 Ligands coordinating by one metal-carbon single bond 4.2.2 Ligands coordinating by several metal-carbon single bonds 4.2.3 Ligands coordinating by metal-carbon multiple bonds 4.2.4 Complexes with unsaturated molecules or groups 4.3 Metallocene nomenclature

scholarly journals Reductive Approach to the Synthesis of the Molecular Lanthanide Polypnictide Complexes

Vestnik RFFI ◽  
2019 ◽  
pp. 101-112
Author(s):  
Sergey N. Konchenko
Keyword(s):  
Coordination Chemistry ◽  
Heavy Element ◽  
Organometallic Compounds ◽  
Structural Diversity ◽  
Main Group ◽  
Heavy Elements ◽  
Heterometallic Complexes ◽  
Donor Ligands ◽  
New Family

In spite of the vigorous development during the last few decades, the coordination chemistry of lanthanides (Ln) is 95% still the chemistry of complexes with O- and N-donor ligands. The compounds with the Ln—E bond (E is a heavy element of the group 15th or 16th) up to now are considered as unconventional or exotic. Recently the fruitful “reductive approach” to this kind of compounds has been developed. The approach involves the performing of reactions between the strong reductants (Ln(II) complexes) and inorganic or organometallic compounds of the main group heavy elements. This paper is focused on the synthesis and structural diversity of the new family of the lanthanide compounds – polypnictide homo- and heterometallic complexes.

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