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33744931755
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Assuming a square-based pyramidal geometry (see Figure 2) and discounting the possibility of stereoisomeric chelate ring conformations, we deduced that the stereoisomers of 8 and 9 must arise from a different configuration at the newly formed carbinol centers. However, the stereoisomers of 10 arise from a different configuration at the osmium center.
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22
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0034311996
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Gill, N.K.4
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30
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33744930973
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note
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Compound 21 crystallised as a mixture of two distinct types of crystals. The structure described in this report is that of the minority phase, which formed large red-brown prismatic single crystals. The majority phase consisted of brown needles, mostly as polycrystalline aggregates; it was found to be possible to determine the unit cell of this material (at 150 K, triclinic, a = 8.4846(3), b = 9.1792(4), c = 16.5417(8) Å, α = 95.9657(17), β = 90.7644(19), γ = 95.109(2)°). However, because of the poorly defined positioning of the two propyl groups, the crystallographic data did not lead to publishable results.
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