Download Coordination Chemistry of Macrocyclic Compounds by Gordon A. Melson (auth.), Gordon A. Melson (eds.) PDF

By Gordon A. Melson (auth.), Gordon A. Melson (eds.)

Chemists were conscious of the life of coordination compounds con­ taining natural macrocyclic ligands because the first a part of this century ; even though, in basic terms in past times few years have they accelerated study into the chemistry of those compounds. the growth used to be initiated within the early Nineteen Sixties by way of the synthesis and characterization of compounds containing a few new macrocyclic ligands. The synthesis of compounds that may function version platforms for a few traditional items containing huge jewelry as ligands supplied the most target for the early growth of study attempt; certainly, a recurrent subject in the back of a lot of the pronounced chemistry has been the analogy among man made macrocyclic compounds and plenty of natural-product structures. extra lately, the emphases of said learn have ranged over the complete spectrum of chemistry, and the variety of guides that debate macrocyclic chemistry has elevated at a dramatic expense. the finished examine has been stated in numerous journals during the global yet there was no prior try to deliver the key advancements jointly lower than one hide. This e-book, as a result, makes an attempt to fulfill the necessity for a unmarried resource within which there's either a set and a correlation of data about the coordination chemistry of macrocyclic compounds. The chapters during this ebook speak about numerous facets of macrocyclic chemistry, and whereas those chapters as a complete represent an in-depth survey of the state-of­ the-art of the sector, each one bankruptcy is written as a whole unit.

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Extra resources for Coordination Chemistry of Macrocyclic Compounds

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120) These authors found that the addition, under N 2, of Mes[14]4,1l-dieneN4·2HCI04 to a solution of Fe(CI04)2 in acetonitrile and triethyl orthoformate followed by neutralization by the addition of triethylamine causes a deep red solution to be formed, from which a pink precipitate is produced on heating. The precipitate is [Fe(Me6[14]4,II-dieneN4)(CHaCN)2](CI04)2' isomer A. The addition of ether to the filtrate from above causes a second crop of pink crystals to be obtained of identical formula, isomer B.

126) Dissolution of these low-spin, five-coordinate complexes in water results in the displacement of the coordinated perchlorate giving complexes of the form [CoL(H20)2]2+ in aqueous solution. (28) Treatment of this complex with concentrated HCI in aqueous methanol followed by evaporation on the steam bath(127) results in the isolation of green crystals of [Co(Me6[14]4,II-dieneN",)CI2]CI04, isomer a. Isomer b of this complex can be prepared by the addition of a hot methanolic solution of cobalt(II) acetate to the ligand dihydroperchlorate salt.

Melson majority of the ligands contain nitrogen donor atoms and are coordinated in a planar manner to the metal ion. The emphasis on these species is undoubtedly related to the existence of naturally occurring metal complexes such as metalloporphyrins, vitamin B12, chlorophyll, etc. The development of effective, reliable syntheses for complexes containing synthetic macrocyclic ligands that may serve as models for the natural complexes is one reason for the rapid development of the chemistry of macrocyclic complexes.

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