Crystallographic and Structural Analysis of Iron Heterometallic Compounds. Part I. Heterobinuclear Compounds

Abstract

The chemistry of iron has an active area of research, particularly in the fields of catalysis and biochemistry. This review includes eighty-five double salts of iron and over eight hundred and fifty heterobinuclear iron compounds of known crystal structure. The heterometal atoms include non -transition and transition metals, as well as lanthanides and actinides. Correlations between structural parameters, heterometal and ligand donor atoms are developed and an overall summary of the metal -metal distances is given. CONTENTS

Structural characterization of heteropolymeric iron and main group metal complexes

“…In many cases, heterometal compounds have been prepared for which crystallographic and structural data have been obtained. The structural chemistry of 800 heterodimer iron compounds has been reviewed (Melnik et al , 2006 ), as well as over 350 heterotrimers (Melnik et al , 2007 ), almost 300 heterotetramers (Melnik et al , 2008 ), 180 heteropentamers (Melnik et al , 2010 ), 160 heterohexa and heteroheptamers (Melnik and Holloway , 2011 ), and 130 heteroocta and heterooligomer clusters (Mirskij , 2009 ). The structural chemistry of polymeric heterometal iron compounds, in which alkali metals are partners to the iron, has been reviewed recently (Meln í k et al, in press ).…”

Crystallographic and Structural Analysis of Iron Heterometallic Compounds Part IV: Heteropentameric Compounds

“…In many cases compounds have been obtained for which crystallographic and structural data could be obtained. The structural chemistry of eight hundred and fifty heterobinuclear iron compounds has been reviewed recently [1], as well as over three hundred and fifty 4 ]- [9] In black Fe 4 Sb cluster [10], the [Sb{Fe 2 (CO) 8 }{Fe(CO) 4 } 2 ]· anion has a slightly distorted tetrahedral core, in which the four -coordinate antimony 5cM Ρ ""ι °! S " ΟΟ"!…”

Contents

“…Many structural studies of iron compounds have been published. To date these include comprehensive overviews of structural data for monomeric [1], dimeric and oligomeric iron coordination compounds [2], iron carbonyls [3] as well as heterobinuclear [4] and heterotrimeric iron clusters [5]. Variations and trends in bond lengths and angles were found and their importance was discussed in these reviews.…”

“…In two black compounds [9], a trigonal planar array around a T1 atom is formed by three Fe(CO) 2 (r| 5 -cp) or Fe(CO) 4 fragments. The former contains two crystallographically independent clusters with the average Tl-Fe distances of 2.642(2) and 2.643(2) Ä.…”

“…The red compound with the Fe 3 Sn cluster [11] consists of four disordered (NEt 4 ) + cations and two [Sn{Fe(CO) 4 In the dark red compound including an Fe 3 Sn cluster [12], a distorted tetrahedral geometry about the tin atom is created by three Fe(CO) 2 cp fragments and an OH group (SnFe 3 0). The average Sn-Fe bond length is 2.614(2) A.…”