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Cyanide‐Bridged Arrays of 2, 3 and 4 Metal Atoms Based on Salene–Iron Complexes – Syntheses, Structures and Metal–Metal Interactions
Author(s) -
Geiß Andreas,
Vahrenkamp Heinrich
Publication year - 1999
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199910)1999:10<1793::aid-ejic1793>3.0.co;2-3
Subject(s) - chemistry , metal , cyanide , cyclic voltammetry , crystallography , group 2 organometallic chemistry , spectral line , organometallic chemistry , reagent , inorganic chemistry , stereochemistry , electrochemistry , molecule , crystal structure , organic chemistry , electrode , physics , astronomy
Salene–Fe III complexes of the types LFeCl and [LFe(CN) 2 ] − were treated with organometallic reagents to introduce the cyanide‐linked units (CO) 5 Cr, (CO) 5 Mo, (CO) 5 W, Cp(CO) 2 Fe, Cp(dppe)Fe, and Cp(PPh 3 ) 2 Ru. IR spectra and structure determinations revealed that all resulting complexes contained M–CN units with N coordination to the salene–Fe units. They were either dinuclear M–CN–Fe(salene), trinuclear M–CN–Fe(salene)–NC–M, or tetranuclear M–CN–Fe(salene)–Fe(salene)–NC–M species. Cyclic voltammetry showed that there are significant electronic interactions between the two outer organometallic units in the trinuclear complexes. UV/Vis spectra indicated a metal–metal charge transfer from the outer Cp(dppe)Fe groups to the central Fe III . The magnetic moments at room temperature of the tri‐ and tetranuclear complexes are slightly lower than those calculated for isolated high‐spin Fe III species.