Organometallic pnicogen complexes. IV. Synthesis, structure, and bonding of new organometallic arsenic-metal atom clusters containing a metal-bridged multiply bonded As2 ligand: Co2(CO)6As2 and Co2[(CO)5PPh3]As2

A soft molecular 2Fe–2As precursor approach to the synthesis of nanostructured FeAs for efficient electrocatalytic water oxidation

“…Since the rst reports on coordinatively stabilized, substituentfree As n (arsenido) ligands by Dahl in 1969, 43 several TM arsenide clusters have been synthesized using yellow arsenic (As 4 ) or AsX 3 (X ¼ Cl, H) as sources. [44][45][46][47] Stable and robust As-carrying molecules could also be employed as suitable As sources. The facile synthesis and isolation of stable and robust arsaethynolate anion (AsCO À ) containing compounds were rst reported by Goicoechea and co-workers 48 and later, we reported the facile one-pot synthesis of the [Na(OCAs)(dioxane) x ] salt.…”

“…[51][52][53] Strikingly, unlike other 2M-2E complexes (M ¼ metal, E ¼ P, As), the iron arsenide cluster core in 2 has not a buttery-like structure. [44][45][46][47] The geometry around the iron atoms is tetrahedral instead, generating a planar 2Fe-2As unit. Such a cluster core structure is unprecedented in pnictido transition-metal chemistry.…”

Periodical trends in [Co6E(CO)16]- clusters: Structural, synthetic and energy changes produced by substitution of P with As

“…Accordingly, AsR 3 are typical ligands in organometallic chemistry, [3] AsR fragments mimic M(CO) n moieties as vertices of the cage, [4] and As atoms may be fully surrounded by metals in clusters like [Rh 10 As(CO) 22 ] 3-. [5] Transition and main group elements may play interchangeable roles, as shown by the complete series As 4n {Co(CO) 3 } n (n = 0, [6] 1, [7] 2, [8] 3 , [9] 4[10]), which nicely illustrate the isolobal principle. [11] Moreover, the construction of molecular architectures with different structural elements can be relevant for catalysis, since the formation of strong E-M bonds can confer extra stability to the molecules.…”

“…As(I) and As(III) compounds such as (AsPh) 6 [4] or (AsMe) 5 , [7] AsCl , [8] AsH 3 [9] or AsPh 3 . [5] are typically used as sources of As.…”

Synthesis of polyantimony ligand complexes starting from Cp*4Sb4

“…With the first reports on polypnictogen ligand complexes in the 1960s, 1,2 an interesting and versatile field of chemical research emerged. Since that time, numerous examples of such compounds were synthesized, especially complexes containing polyphosphorus and polyarsenic units.…”