Synthesis, Characterization, and Reactivity of a Novel μ-η²:η²-Diselenidodicopper(II) Complex

Abstract

The first μ-η(2):η(2)-diselenidodicopper(II) complex has been obtained in the reaction of a copper(I) complex with N,N',N″-tribenzyl-cis,cis-1,3,5-triaminocyclohexane and elemental selenium. The structure and reactivity of the complex is described.

Reactivity of uranium(iv) bridged chalcogenido complexes UIV–E–UIV(E = S, Se) with elemental sulfur and selenium: synthesis of polychalcogenido-bridged uranium complexes

“…14 The U-Se bonds are slightly asymmetric (U1-Se1, 2.962(1)Å; U1-Se2, 3.060(1)Å; U2-Se1, 3.078(1)Å; U2-Se2, 2.942(1)Å) and are slightly longer compared to typical U-Se-U bond distances (Table 1). 14,19,37,43 The Se1-Se2 bond distance of 2.377(1)Å is comparable to the respective bond lengths in transition metal 32,33,44,45 and lanthanide complexes 32,[46][47][48][49] as well as uranium perselenide complexes (2.293(2)Å-2.401(4)Å). 39,50 Additionally, the U(IV)-Se 2…”

Oxygen, sulfur, selenium, tellurium and polonium

“…75 The Se-Se distance in [Cu II 2 (Se 2 )(Bn 3 TACH) 2 ](SbF 6 ) 2 is comparable to that in Na 2 Se 2 . 76 The Se K-edge energy (X-ray absorption) suggests there is a Se-Se bonding interaction in (Cp 0 Ni) 2 (m 2 -Se 2 ), thus the bridge should be regarded a coordinated subselenide (Se 2…”

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.…”

“… 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 ].…”