It is important to recognize different H1 NMR spin systems and the resulting coupling patterns. Match the following common fragments with the expected pattern. R, R1 and R2 represent generic alkyl groups. Each structure will give two resonances in a H1 NMR spectrum. Predict the splitting pattern of the two resonances, in no particular order. A. A central carbon is bonded to an R group, a methyl group and two hydrogens. Predict the splitting pattern for A. doublet, singlet quartet, quartet triplet, quartet triplet, triplet B. A central carbon is bonded to two methyl groups, a hydrogen and an R group. Predict the splitting pattern for B. doublet, hextet singlet, hextet singlet, heptet doublet, heptet C. The compound is R one C H 2 C H 2 bonded to R two Predict the splitting pattern for C. doublet, doublet doublet, triplet triplet, triplet singlet, singlet