Title: Synthesis and structural characterization of the novel tetrahedral MNiFeS clusters containing functionally substituted cyclopentadienyl ligands (η5-RC5H4(η5-C5H5)MNiFeS(CO)5 (M = Mo, W ; R = CHO, CH3CO, CH3O2C, CH2OH, CH(OH)CH3, (NO2)2C6H3NHN). The crystal molecular structure of (η5-CHOC5H4(η5-C5H5)MoNiFeS(CO)5
Abstract: A series of functionally substituted cyclopentadienyl MNiFeS clusters (η5-RC5H4(η5-C5H5)MNiFes(CO)5 (1, M = Mo, R = CHO; 2, M = W, R = CHO; 3, M = Mo, R = CH3CO; 4, M = W, R = CH3CO; 5, M = Mo, R = CH3O2C; 6, M = W , R = CH3O2C) were successfully synthesized by isolobal displacement reactions of corresponding functional cyclopentadienyl MCoFeS clusters η5-RC5H4MCoFeS(CO)8 with nickelocene in THF at reflux. Further treatment of clusters 1–4 with reducing NaBH4 at r.t. in MeOH yielded primary and secondary alcohol cluster derivatives (7, M = Mo, R = CH2OH ; 8, M = W , R = CH2OH; 9, M = Mo, R = CH(OH)CH3 ; 10, M = W, R = CH(OH)CH3), which could react with the alkylating reagent Et3OBF4 to give ether cluster derivatives (11, M = Mo, R = CH(OC2H5)CH3; 12, M = W, R = CH(OC2H5)CH3). Although reactions of clusters 1 and 2 with an aqueous acid solution of 2,4-dinitrophenylhydrazine at r.t. led to almost complete decomposition of the starting clusters, the reactions of clusters 3 and 4 under similar conditions afforded phenylhydrazone cluster derivatives (13, M = Mo, R = 2,4-(NO2)2C6H3NHN ; 14, M = W, R = 2,4-(NO2)2C6H3NHN). All these novel cluster products have been characterized by elemental analysis and spectroscopic techniques, as well as for cluster 1 by X-ray crystallographic study.
Publication Year: 1998
Publication Date: 1998-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 23
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