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Is it correct that COSY (not long range COSY) in the OsH-CH-CH chain is demonstrating cross-peaks only for OsH-CH-CH and OsH-CH-CH fragments independently on J between protons in OsH-CH-CH? |
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It all depends on the magnitude of the coupling, if it's small, then you won't see the correlation, typically in COSY you will rarely see H-H couplings where protons are separated by > 3 bonds, especially in the aliphatic chains. |
