Synthesis and Characterization of New Phenylbis(salicylato)bismuth(III) Complexes
作者:Vitalie Stavila、James C. Fettinger、Kenton H. Whitmire
DOI:10.1021/om070115c
日期:2007.7.1
adducts [BiPh(Hsal)2(phen)] (2a), [BiPh(Hsal4Me)2(phen)] (2b), [BiPh(Hsal)2(bipy)] (2c), and [BiPh(Hsal4Me)2(bipy)] (2d). Crystallographic analyses of the adducts showed the solids to have monomeric structures with six-coordinate Bi(III). One salicylato ligand is coordinated in a monodentate fashion and the other in a bidentate, chelating manner. The phenol oxygen atoms remain uncoordinated in both
Heterobimetallic Bismuth−Transition Metal Salicylate Complexes as Molecular Precursors for Ferroelectric Materials. Synthesis and Structure of Bi<sub>2</sub>M<sub>2</sub>(sal)<sub>4</sub>(Hsal)<sub>4</sub>(OR) <sub>4</sub> (M = Nb, Ta; R = CH<sub>2</sub>CH<sub>3</sub>, CH(CH<sub>3</sub>)<sub>2</sub>), Bi<sub>2</sub>Ti<sub>3</sub>(sal)<sub>8</sub>(Hsal)<sub>2</sub>, and Bi<sub>2</sub>Ti<sub>4</sub>(O<sup>i</sup>Pr)(sal)<sub>10</sub>(Hsal) (sal = O<sub>2</sub>CC<sub>6</sub>H<sub>4</sub>-2-O; Hsal = O<sub>2</sub>CC<sub>6</sub>H<sub>4</sub>-2-OH)
作者:John H. Thurston、Kenton H. Whitmire
DOI:10.1021/ic0255454
日期:2002.8.1
salicylic acid, and the metal alkoxides M(OCH(2)CH(3))(5) (M = Nb, Ta) or Ti[OCH(CH(3))(2)](4) have been investigated under different reaction conditions and in different stoichiometries. Six novel heterobimetallic bismuth alkoxy-carboxylate complexes have been synthesized in good yield as crystalline solids. These include Bi(2)M(2)(sal)(4)(Hsal)(4)(OR)(4) (M = Nb, Ta; R = CH(2)CH(3), CH(CH(3))(2)), Bi
Heterobimetallic Bi(III)−Ti(IV) Coordination Complexes: Synthesis and Solid-State Structures of BiTi<sub>4</sub>(sal)<sub>6</sub>(μ-O<sup>i</sup>Pr)<sub>3</sub>(O<sup>i</sup>Pr)<sub>4</sub>, and the Cyclic Isomers Bi<sub>4</sub>Ti<sub>4</sub>(sal)<sub>10</sub>(μ-O<sup>i</sup>Pr)<sub>4</sub>(O<sup>i</sup>Pr)<sub>4</sub> and Bi<sub>8</sub>Ti<sub>8</sub>(sal)<sub>20</sub>(μ-O<sup>i</sup>Pr)<sub>8</sub>(O<sup>i</sup>Pr)<sub>8</sub>
作者:John H. Thurston、Arvind Kumar、Cristina Hofmann、Kenton H. Whitmire
DOI:10.1021/ic049061e
日期:2004.12.1
structure consists of a [Ti(4)(sal)(6)(O(i)Pr)(7)](3)(-) ion capped by a Bi(3+) ion. Complexes 2 and 3 exhibit cyclic ring structures of bismuth and titanium atoms showing crystallographically imposed inversion symmetry. Both structures occlude large quantities of lattice solvent. The compositional and structural parameters from the single crystal studies indicate that complexes 2 and 3 may represent
Selective Arylation Reactions of Bismuth−Transition Metal Salicylate Complexes
作者:Vitalie Stavila、John H. Thurston、Kenton H. Whitmire
DOI:10.1021/ic9010357
日期:2009.7.20
Heterometallic bismuth-niobium or -tantalum salicylate complexes react with sodium tetraphenylborate to produce complexes in which one or more aryl groups have been transferred from boron to bismuth with the concomitant displacement of a eta(2)-salicylato ligand. When the previously reported Bi2Ta2(sal)(4)(Hsal)(4)(OEt)(4) (1) and BiTa4-(mu-O)(4)(sal)(4)(Hsal)(3)((OPr)-Pr-i)(4) (2) are treated with an alcoholic solution of NaBPh4, the compounds [PhBi(Hsal)Ta(sal)(2)(OEt)(2)center dot EtOH](2) (3) and PhBiTa4(mu-O)(4)(Hsal)(2)(sal)(4)(OEt)(4)center dot CH2Cl2 (4) are produced (sal = O2CC6H4-2-O2-, Hsal=O2CC6H4-2-OH-). The core geometries of the heterometallic complexes are retained. However, if preparations of compound 1 are treated with NaBPh4 without prior isolation of 1, [Ph2BiNb(sal)(2)(OMe)(2)](infinity) (5) is produced instead. This compound was characterized both as a solvent-free crystalline form and as one containing a lattice diethyl ether. The compound exhibits a polymeric chain structure that can be viewed as alternating (Ph2Bi](+) and [Nb(sal)(2)(OMe)(2)(-) units connected via bridging carboxylate groups. The arylation of the bismuth(III) center proceeds smoothly under mild conditions at room temperature, affording anew means for the mild functionalization of bismuthtransition metal heterometallic complexes.
Solvent-free synthesis of bismuth thiolates and carboxylates
作者:Philip C. Andrews、Glen B. Deacon、W. Roy Jackson、Melissa Maguire、Natalie M. Scott、Brian W. Skelton、Allan H. White
DOI:10.1039/b209347b
日期:2002.12.9
The thermally induced solvent-free reactions of Ph3Bi with a series of thiols and carboxylic acids (2-mercaptobenzothiazole, 2-mercaptobenzoxazole, 2-ethoxybenzoic acid, 1-mercapto-2-propanol and salicylic acid) in the ratio 1 ∶ 3 have been investigated and shown to produce the fully substituted bismuth thiolates and benzoates in good yields and purity. Thermogravimetric analysis and differential scanning calorimetry have been used to study the profiles of those reactions involving two solid components and indicate that the reactions occur with the onset of the melting of Ph3Bi. The two products from the reactions with 2-ethoxybenzoic acid and 1-mercapto-2-propanol have been characterised by single crystal X-ray diffraction and shown to be dimeric, [(2-EtOC6H5CO2)3Bi]2, 1, and polymeric, [(CH3CH(OH)CH2S)(CH3CH(O)CH2S)}Bi]∞, 2, respectively. Compound 1 crystallises as centrosymmetric dimers with the two Bi centres bridged by carboxylate O atoms with possible polymerisation prevented by the further interaction of one of the ethoxy groups with each metal centre. In contrast compound 2 is made up of monomeric units, containing both a mono-anion and a dianion with quasi polymeric linkages arising from bridging S atoms accompanying OH⋯O hydrogen bonding interactions between the two ligand species.