[Mn(dien) 2 ] 2 [SbSe 4 Cu( μ 2 -Se 4 )]: A heterometallic polyselenide containing a chelating μ 2 -Se 4

Generation and Reactivity of Polychalcogenide Chains in Binuclear Cobalt(II) Complexes

“…In contrast to the plethora of reports on the chemistry of transition metal–polysulfido complexes in general, the chemistries of polyselenides and polytellurides are comparatively less developed. ,,− While an appreciable number of transition metal–polyselenido and relatively a smaller number of transition metal–polytellurido compounds are now available in the literature, most of these examples feature either metal–polyselenido/polytellurido compounds having Se/Te/P-donor ligands − or only Se/Te-donor ligands (polyselenide/polytelluride) ,,− or organometallic compounds, ,,− while some other reports include [Fe­(Se 3 )­L 2 ] 1– (L = N (Dipp)­SiMe 3 , Dipp = 2,6-diisopropylphenyl), [Cu 2 (Se 2 )­(Bn 3 TACH) 2 ] 2+ and [Mn­(dien) 2 ] 2 [SbSe 4 Cu­(μ-Se 4 )] (dien = diethylenetriamine) . The majority of these metal–polychalcogenido compounds are organometallic compounds.…”

“… 43 , 49 , 110 − 115 While an appreciable number of transition metal–polyselenido and relatively a smaller number of transition metal–polytellurido compounds are now available in the literature, most of these examples feature either metal–polyselenido/polytellurido compounds having Se/Te/P-donor ligands 116 − 124 or only Se/Te-donor ligands (polyselenide/polytelluride) 116 , 117 , 120 − 123 or organometallic compounds, 63 , 67 , 125 − 131 while some other reports include [Fe(Se 3 )L 2 ] 1– (L = N (Dipp)SiMe 3 , Dipp = 2,6-diisopropylphenyl), 132 [Cu 2 (Se 2 )(Bn 3 TACH) 2 ] 2+ 133 and [Mn(dien) 2 ] 2 [SbSe 4 Cu(μ-Se 4 )] (dien = diethylenetriamine). 134 The majority of these metal–polychalcogenido compounds are organometallic compounds. Unlike the reactions described in the present work, the synthetic strategy used for the preparation of these reported organometallic compounds, in general, involved either (i) the redox reaction of low-valent metal salts/compounds with elemental chalcogens (S, Se, and Te) 63 , 116 , 118 , 119 , 122 , 125 , 128 , 131 , 133 , 134 or (ii) the reaction of metal complexes with polychalcogenide salts, 117 , 118 , 120 , 121 , 123 , 127 , 132 often for a long time (2–6 days) at high temperatures (80–145 °C).…”

“… 134 The majority of these metal–polychalcogenido compounds are organometallic compounds. Unlike the reactions described in the present work, the synthetic strategy used for the preparation of these reported organometallic compounds, in general, involved either (i) the redox reaction of low-valent metal salts/compounds with elemental chalcogens (S, Se, and Te) 63 , 116 , 118 , 119 , 122 , 125 , 128 , 131 , 133 , 134 or (ii) the reaction of metal complexes with polychalcogenide salts, 117 , 118 , 120 , 121 , 123 , 127 , 132 often for a long time (2–6 days) at high temperatures (80–145 °C). The majority of these reported complexes feature the smallest polychalcogenide units (Se 2 2– /Te 2 2– ) with the exception of compounds such as [{Mn(μ-Se 6 )(tren)} 2 ].…”

Nonheme binuclear transition metal complexes with hydrosulfide and polychalcogenides

“…Examples of such complexes include [{Mn(μ-Se 6 )(tren)} 2 ] (tren = tris(2-aminoethyl)amine) (Scheme 4(a)), 223 [Fe(Se 3 )L 2 ] 1− , [Fe(Se 2 )L 2 ] 1− and [(L 2 Fe)-μ 2 -Se-(FeL 2 )] 2− (L = N(Dipp)SiMe 3 , Dipp = 2,6-diisopropylphenyl) (Scheme 4(b)), 224 [(Co(nacnac)) 2 (μ,η 2 -Se 2 )] (Scheme 4(c)), 225 [Cu 2 (Se 2 )(Bn 3 TACH) 2 ] 2+ (Scheme 4(d)), 226 and [Mn(dien) 2 ] 2 [SbSe 4 Cu(μ-Se 4 )] (dien = diethylenetriamine) (Scheme 4(e)). 227 All the polychalcogenido complexes shown in Schemes 3 and 4 have been characterized by single crystal X-ray structure determinations along with various solution state characterizations such as UV-vis and NMR spectroscopy, mass spectrometry etc. (except for Schemes 4(a), (c), (e), (g), and (h), for which no solution state characterization data were provided).…”