Antimony–Tungsten Triple Bond: A Stable Complex with a Terminal Antimony Ligand

Limitations of Steric Bulk: Towards Phospha‐germynes and Phospha‐stannynes

“…Terminal phosphides and phosphinidenes have become accessible over the last two decades. While transition metal pnictides have been known since Schrock and Cummins described the first terminal phosphides in 1995, related examples for main group systems are still rare. Bertrand recently demonstrated that ligand bulk can indeed lead to the stabilisation of a terminal phosphorus atom bonded to a main group element centre in the form of a phosphino‐phosphinidene (Figure A) .…”

“…The major limitation in accessing such species is that all the steric protection must be offered by a single monodentate substituent and no ligands capable of providing such shielding are yet known.Te rminal phosphides and phosphinidenes have become accessible over the last two decades. While transition metal pnictides have been known since Schrock and Cummins described the first terminal phosphides in 1995, [23][24][25][26] related examples for main group systems are still rare. Bertrandr ecently demonstratedt hat ligand bulk can indeed lead to the stabilisation of at erminal phosphorus atom bonded to am ain group element centrei nt he form of ap hosphino-phosphinidene (Figure 1A).…”

Molecular Pnictogen Activation by Rare Earth and Actinide Complexes

“…While activation of molecular forms of these elements is unlikely, it is worth noting that Scheer and co-workers reported a tungsten terminal stibido complex {N(CH2CH2NSiMe3)3}3W≡Sb prepared from reaction of {N(CH2CH2NSiMe3)3}3WCl with LiSb(H){CH(SiMe3)2} [158] …”

Triple Bonds Between Iron and Heavier Group 15 Elements in AFe(CO)3− (A=As, Sb, Bi) Complexes

“…[1] Te rminal-bonded TM Cand TM Ntriple bonds are abundant in carbides and nitrides,a nd their chemistry has been well-developed in coordination and organometallic chemistry. [4] Since the discovery of stable complexes containing triple bonds between transition metals and heavier analogues of the carbon as well as the nitrogen groups in the middle 1990s, [5,6] alarge number of complexes involving Si, Ge,Sn, Pb, [7][8][9] and P, As,S b [9][10][11][12][13] have been isolated and characterized, with the only exception being Bi. [4] Since the discovery of stable complexes containing triple bonds between transition metals and heavier analogues of the carbon as well as the nitrogen groups in the middle 1990s, [5,6] alarge number of complexes involving Si, Ge,Sn, Pb, [7][8][9] and P, As,S b [9][10][11][12][13] have been isolated and characterized, with the only exception being Bi.…”

“…No unequivocal TM-bismuth triplebonded species has been reported experimentally so far, [9,14] although complexes with main-group-bismutht riple bonds (for example,B i ÀBt riple bond in BiB 2 O À )a re known. [12] While triple bonding between transition metals and the heavier Group 14 and Group 15 elements is known, it is confined to the Group 5and Group 6 early transition metals. [12] While triple bonding between transition metals and the heavier Group 14 and Group 15 elements is known, it is confined to the Group 5and Group 6 early transition metals.…”