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Natural Radiative Lifetimes of Some Excited Bi I Levels Belonging to the 6p^(2)7s and the 6p^(2)6d Configurations Measured by the Hanle Method

The natural radiative lifetimes of some excited Bi I levels belonging to the 6 p 2 7 s and the 6 p 2 6 d configurations have been determined by analyzing Hanle depolarization curves obtained in an atomic beam experiment on the 100% abundant isotope Bi 209 ( I =9/2). Taking the exciting light spectral distribution into account the following values for the lifetimes have been obtained: ##IMG## [http

{2,6-bis[(diphenylphosphino)methyl]-phenyl}chloroplatinum(II)

The title compound, [PtCl(C32H27P2)], has a pseudo-square-planar coordination geometry around the Pt atom with the P,C,P'-tridentate ligand forming two five-membered rings that are tilted with respect to the coordination plane. The two Pt-P the Pt-Cl and the Pt-C distances are 2.2794 (9)/2.2749 (10), 2.3831 (10) and 2.002 (3) Angstrom, respectively.

rac-4,8-Divinylbicyclo[3.3.1]nonane-2,6-dione

The title compound, C13H16O2, is a chiral bicyclic structure composed of two fused cyclohexane rings possessing both boat and chair conformations. The molecules are packed in enantiopure columns which are pairwise linked forming an overall racemic solid; within the column pairs the packing is governed by weak dipole-dipole interactions stemming from stacked carbonyl functionalities (COcentroid-COc

[2,6-Bis(di-tert-butylphosphinomethyl)phenyl-kappa P-3,C-1,P '](trifluoroacetato)palladium(II)

The Pd-II atom in the title compound, [Pd(C2F3O2)(C24H43P2)], adopts a distorted square-planar geometry with the P atoms in a trans arrangement, forming two five-membered chelate rings. Four intramolecular C-H center dot center dot center dot O hydrogen bonds occur. The crystal packing reveals one weak intermolecular C-H center dot center dot center dot O hydrogen bond, which self-assembles the mo