Heterotrimetallic Iron(II)−Nickel(II)−Manganese(I) Chalcogenolate Complexes Containing a Heteroleptic Hexachalcogenolatonickel(II)/Homoleptic Hexathiolatonickel(II) Core
摘要:
Complex cis-[Mn(CO)(4)(2-S-C4H3S)(2)](-) was employed as a metallo chelating ligand to synthesize [(CO)(4)Mn(mu-2-S-C4H3S)(2)Ni(mu-2-S-C4H3S)(2)Mn(CO)(4)] (1) with a square planar Ni-II-thiolate core. The longer Ni-II... Mn-I distances and electronic population of nickel(II) (d(8)) are adopted to rationalize the construction of complex 1. Cleavage of the Mn-I-S bond in complex 1 by an incoming tridentate metallo ligand fac-[Fe(CO)(3)(ER)(3)](-) (E = S, R = C4H3S; E = Se, R = Ph), followed by a thiolate group ([2-S-C4H3S]-) rearranging to bridge two metals, led directly to the anionic [(CO)(3)Mn(mu-2-S-C4H3S)(3)Ni(mu-ER)(3)Fe(CO)(3)](-) (E = S, R = C4H3S (2); E = Se, R = Ph (3)) with a homoleptic/heteroleptic hexachalcogenolatonickel(II) core, respectively. Dropwise addition of cis-[Mn(CO)(4)(2-S-C4H3S)(2)](-) to the anionic 2 in THF resulted in formation of a linear trinuclear complex [(CO)(3)Mn(mu-2-S-C4H3S)(3)Ni(mu-2-S-C4H3S)(3)Mn(CO)(3)](2-) (4) possessing a homoleptic hexathiolatonickel(II) core; It seems reasonable to conclude that the d(6) Mn(I) [(2-S-C4H3S)(3)Mn(CO)(3)](2-) fragment is isolobal with the d(6) Fe(II) [(ER)(3)Fe(CO)(3)](-) fragment in complexes 4, 3, and 2.
摘要2当量的反应。二有机基二硫化物,(二(2-苯并噻唑基)二硫化物,二(2-噻吩基)二硫化物和二(2-甲基-3-呋喃基)二硫化物)。[HFe(CO)4]-的基团可得到稳定的三齿fac-[Fe(CO)3(SR)3]-(R = C 7 H 4 SN(1); C 4 H 3 S(2); C通过形成中间体[RSFe(CO)4]-分别形成4 H 2 O- o -CH 3(3))。相反,由[HFe(CO)4]-与2-氨基苯基二硫化物反应制得的[Fe(CO)4(4SC 6 H 4-o -NH 2)]--氧化了2-氨基苯基二硫化物, [SC 6 H 4-o -NH 2]-的伴随位移导致中性单体化合物顺式[[Fe(CO)2(SC6 H 4-o -NH 2)2](6)。显然,硫铁酸衍生物的反应性和稳定性可以通过侧基配体的选择来调整,并根据有机二硫键固有的键强度和[RSFe(CO)4]-络合物中硫醇盐原子的亲