Synthesis and Structure of Seven‐Coordinate Bismuth(V) Complexes with Benzenoid and Non‐Benzenoid Arene Ligands: Tri(aryl)tropolonatobismuth(V) Complexes

Abstract

COMMUNICATIONSh=15.387(4). L' = 41.57(2) A, / l = 99.44(3)-, V = 12814.5 A'. monoclinic. spacegroup ('2/r,Z= 8,p,,,,, ~1 . 2 5 1 gcm-3,p = j1.2cm-',F(000) = 4912. Ci-ystal mounted in perflouroether oil; measurements at 213 K. Data collection:1.7738 measured reflections. 7354 of which were independent and 4339 with F 4o(F). Structure solution and refinement: heavy atom method. T1 and Si atoms anisotropically refined. C atoms isotropically. The htructure solution converged without inclusion of H atoms and posaible solvent molecules at R , = 0.135. wR2 = 0.417. GOF =1.097. The crystal decomposed considerably during the measurement; the measurement m'as stopped uhen the intensity of two standard reflections became smaller than 50'4,. which is why the C atoms were not refined anisotropically. Further details of the crystal structure investigation may be obtained from the Fachint'ormationszentrum Karlsruhe, D-76344 Eggenstein-Leopoldshafen (German)) on quoting the depository number CSD-404429.

Syntheses, crystal structures and antimicrobial activities of monomeric 8-coordinate, and dimeric and monomeric 7-coordinate bismuth(III) complexes with tridentate and pentadentate thiosemicarbazones and pentadentate semicarbazone ligands

“…In a separate account, the discovery and design of bioactive bismuth compounds, and the interactions of bismuth compounds with biomolecules and pharmaceutical agents have been recently reviewed [20][21][22][23][24][25][26][27][28]. Generally, the bismuth(III) atom with a larger ionic radius (1.16 A) [29] has one inert electron pair (6s 2 ) and forms the complexes of the non-transition metal center with higher coordination numbers.…”

The Structurally Flexible Bicyclic Bis(2-hydroxyethanethiolato)bismuth(III) Complex: A Model for Asymmetric Monoanionic Chelation of Bismuth(III)

“…Recent interest in the fundamental chemistry of bismuth has been prompted by a demonstrated bioactivity − and the need for viable synthetic approaches to new materials. − A variety of commercial bismuth preparations have been used in the treatment of gastrointestinal disorders, and most contain materials which are classified as bismuth salts, such as bismuth subcitrate and bismuth subsalicylate. The structures of these compounds are complicated, and their chemistry and bioactivity is not understood.…”

Bismuth–dithiol inhibition of the Escherichia coli rho transcription termination factor

“…Most of these bismuth-dithiol mixtures and other bioactive bismuth agents have not been structurally characterized, in part, because of their low solubility in solvents [8]. Thus, only a few X-ray crystallographic and NMR structures of bioactive bismuth complexes have appeared [11,[28][29][30][31][32][33][34][35]. Relevant to our study are reports that bismuth centers can form complexes with three sulfur substituents or six substituents where three of the six substituents are sulfur and the other three are either nitrogen or oxygen [28][29][30][31][32].…”