What Does "Y" Denote in the Coupling Parameter ^xJ_y

Q87: The chemical shift of the protons of

Q88: Identify the methyl hydrogen with the

Q89: How many signals appear in proton-decoupled ¹³C

Q90: Which of the carbon atoms in the

Q91: The coupling constant, J, between the protons

Q93: Which of the following compounds gives a

Q94: Which C₄H₉Br compound gives a triplet at

Q95: How many signals appear in the proton-decoupled

Q96: How many types of equivalent hydrogens are

Q97: How many signals appear in the proton-decoupled