From Pseudo-octahedral to Pseudo-trigonal Bipyramidal Configuration: Syntheses and Molecular Structures of 4-t-Bu-2,6-[(EtO)₂P(O)]₂C₆H₂BiCl₂and [1(Bi),3(P)-Bi(Cl)OP(O)(OEt)-5-t-Bu-7-P(O)(OEt)₂]C₆H₂

Nitrogen, phosphorus, arsenic, antimony and bismuth

“…Both thio-and selenosemicarbazone groups have been shown to be effective ligands for indium, antimony and bismuth complexes, 133 NCN pincer ligands may be used to support Sb-and Bi-based phosphate groups 134 and, for bismuth, novel OCO pincer compounds such as 79 have been described. 135 For antimony, the catecholates 80, formed by reaction of the corresponding quinone with an alkylstibine 136 and the ability of related compounds to act as radical scavengers has also been reported. 137 It was concluded that the activity of the compounds was dependant on the first oxidation potential.…”

The reactivity of antimony and bismuthN,C,N-pincer compounds toward K[BEt3H] – the formation of heterocyclic compoundsvs. element–element bondsvs.stable terminal Sb–H bonds

“…1A). 6 Since that time, the chemistry of these ligands, that may be considered as redox innocent, has been developed significantly, including other examples of N , C , N , 7 O , C , O 8 and N , C , O 9 coordinated organoantimony and organobismuth compounds (Fig. 1A).…”

Chelating Phosphorus–An O, C, O‐Coordinating Pincer‐Type Ligand Coordinating PIII and PV Centres

“…In recent years, some of the authors reported the syntheses, reactivity and structures of a variety of organosilicon, [1][2][3][4][5][6] organotin, [7][8][9][10][11][12][13][14][15][16][17][18][19][20] organolead [21,22] and organobismuth [23] compounds bearing phosphorus-containing O,C,O-coordinating pincer-type ligands (Scheme 1, type A). In the course of these studies we learned that the corresponding organoelement cations, for instance obtained by abstraction of a phenyl or hydrogen substituent (R in Scheme 1), gave the corresponding benzoxaphosphasilole, [2,3] benzoxaphosphastannole, [3,8,10] benzoxaphosphaplumbole [21] of type B upon reaction with water or a halide anion (Scheme 1).…”

“…The latter undergoes cleavage by nucleophiles such as water and halide anions (Scheme 1 ). Alternatively, the bismuth representative C [23] formed spontaneously in course of the reaction between BiCl 3 with [5‐ t ‐Bu‐2,6‐{P(O)(OEt) 2 } 2 C 6 H 2 Li.…”