Carbons. -The rhodium-catalyzed title reaction is highly selective and leads to the exclusive formation of the expected linear γ,δ-unsaturated aldehydes. The stereointegrity of the quaternary carbon center of the cyclopropanes remains unaffected. The geometry of the C=C double bond in the products depends on the substituents at the alkylidene of the starting cyclopropanes. -(SIMAAN, S.; MAREK*, I.; J. Am.
Synchrotron-radiationphotoemission results for the 29-K superconductor Bao.6K0.4Bi03 are reported for the 14to 135-eV photon-energy range. Resonant photoemission is used to identify shallo~core levels and atomic contributions to the valence band. The results are compared to a recently published band-structure calculation.
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