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Enantiotopic groups are identical and indistinguishable except in chiral environments. For instance, the CH 2 hydrogens in ethanol (CH 3 CH 2 OH) are normally enantiotopic, but can be made different (diastereotopic) if combined with a chiral center, for instance by conversion to an ester of a chiral carboxylic acid such as lactic acid, or if coordinated to a chiral metal center, or if ...
One example is [Ru(NH 3) 5 (SMeEt)] 2+. The complex cis-VOCl 2 (SMeEt) 2 exists as meso- and a pair of enantiomers. [7] In complexes of thioethers of the type S(CH 2 R) 2 (R ≠ H), the methylene protons are diastereotopic. Examination of the NMR spectra of such complexes reveal that they undergo inversion at sulfur, without dissociation of the ...
Symmetrical norbornanes and similarly rigid compounds (e.g. 7-oxabicyclo[2.2.1]heptane) also show complex signals for the ethylene fragments, made more complicated by additional splitting by the bridgehead protons. Reich gives several additional examples of magnetic inequivalence in acyclic and cyclic systems containing H 2 C-CH 2 fragments. [3]
These are biblical figures unambiguously identified in contemporary sources according to scholarly consensus.Biblical figures that are identified in artifacts of questionable authenticity, for example the Jehoash Inscription and the bullae of Baruch ben Neriah, or who are mentioned in ancient but non-contemporary documents, such as David and Balaam, [n 1] are excluded from this list.
[24] "History", or specifically biblical history, in this context appears to mean a definitive and finalized framework of events and actions—comfortingly familiar shared facts—like an omniscient medieval chronicle, shorn of alternative accounts, [25] psychological interpretations, [26] or literary pretensions. But prominent scholars have ...
God is the creator of all things. Many religions, such as Judaism, Christianity, and Islam believe he created the entire universe and everything in it. He has spiritual attributes found in angels and humans. God has unique attributes of omnipotence, omnipresence, and omniscience. He is the model of perfection in all of creation. [3]
For a list of all events in the life of Jesus, see Gospel harmony For a list of parables told by Jesus, see Parables of Jesus For a list of miracles attributed to Jesus, see Miracles of Jesus
For example, the half-life of 256 No is almost three seconds, but that of 258 No is only 1.2 milliseconds. [ 73 ] [ 71 ] [ 72 ] This shows that at nobelium, the mutual repulsion of protons poses a limit to the region of long-lived nuclei in the actinide series. [ 75 ]