CsBiO2 (hellgelb) und Cs3BiO3 (gelb) wurden durch Festkörperreaktion aus den binären Komponenten Cs2O und Bi2O3 bei Temperaturen von 700°C bzw. 550°C dargestellt. In CsBiO2 liegen nach der Einkristallröntgenstrukturanalyse (C2/c; a = 827,4(2); b = 920,4(2); c = 597,87(9) pm; β = 122,51(1)°; Z = 4; 975 Diffraktometerdaten; R1 = 0,058; wR2 = 0,077) unendlich ausgedehnte  ∞1[BiO2/2O′2/2]‐Ketten vor. Die Kristallstruktur von Cs3BiO3 (P213; a = 920,86(8) pm; Z = 4; 289 Diffraktometerdaten; R1 = 0,048; wR2 = 0,081) enthält ‚isolierte’︁ pyramidale BiO33−‐Anionen. Die Kationenanordnung in Cs3BiO3 entspricht der Atom‐anordnung in der intermetallischen Phase Cs3Bi.

Synthesis and Conformation of Hexahydro-isoquino[3,2-a][2]benzazepines of the B-Homoberbine TypeSchema 3 Schema 2 R*l+* M e 0 POCI3/MeCN J MeO-R3 M e 0 7 , 51 M e 0 %-9a ' NH M e 0 A Imidlacton ,I --*I

Potassium B ism uthate(III), R ubidium B ism uthate(III), Synthesis, Crystal Structure K 3B i 0 3 and R b3B i0 3 have been synthesized fo r the first tim e by solid state reactions o f the respective binary com pounds. K 3B i0 3 w as obtain ed from B i20 3 and K 20 at 550 °C, R b3B i0 3 from B i20 3 and Rb20 at 650 °C. T he co m p o u n d s w ere structurally exam ined by single crystal X -ray investigations (K 3B i0 3: I 4 3 m, a = 1070.15(2) pm , Z = 8; R b3B i0 3: P 2, 3, a = 875.48(2) pm , Z = 4). T he structures reveal " isolated" B i0 33_ groups. W hile K3B i0 3 is isostructural to N a3B i0 3, R b 3B i 0 3 has the sam e crystal structure as C s3B i0 3.

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