The Structure of the "Third-Generation" Tris(pyrazolyl)borate Caesium Salt p-BrC(6)H(4)TpCs

作者：Zagermann Johannes; Merz Klaus; Metzler Nolte Nils^*

来源：Zeitschrift fur Anorganische und Allgemeine Chemie, 2011, 637(10): 1277-1279.

DOI：10.1002/zaac.201100086

• Alkali metals
• Caesium
• Crystal structure
• Scorpionates
• Tris(pyrazolyl)borates

Slow crystallisation at lowered temperature yielded crystals of the "third-generation" tris(pyrazolyl)borate transfer agent p-BrC(6)H(4)TpCs (Tp'Cs) 1 (triclinic; P (l) over bar; a = 8.540(4), b = 15.045(6), c = 15.879(7) angstrom; alpha = 65.853(8), beta = 88.457(8), gamma = 75.056(8)degrees; V = 1791.4(13) angstrom(3); Z = 4). The central caesium ion in 1 interacts with three individual p-BrC(6)H(4)Tp ligands in two different chelating fashions. In particular, kappa(1)-N-coordination and eta(5)-pi-coordination of pyrazole moieties as well as eta(6)-pi-coordination of the p-BrC6H4 substituent are observed. Further, comparable coordination of neighbouring caesium ions leads to the formation of polymeric structures connected by two bridging modes.

• 出版日期2011