what structure would be represented HNMR with  a singlet at 7.29 being caused by 2 hydrogens and a doublet at 3.88 being caused by 9 hydrogens?

2. The full structural formulae of three organic compounds, P, Q and R, are shown below. H H H H HH HHHH Н-С -с- Н H-C- C - C = C – H H - C - C = C – C – H H H H H Q P (a) State one similarity between P, Q and R in terms of their molecular formulae. (b) Name the homologous series that compounds P, Q and R belong to. (c) State one similarity between Q and R in terms of chemical bonding id) Which of these compounds are isomers? Explain your answer.

The bond lengths of ethane, ethene, and ethyne were determined, and a graph of the C-H bond length vs. % s-character of the C hybrid orbital was made. Comment on the observed trend, additionally. How would this trend change if C-H bond energy vs. % s-character of the C hybrid orbital was graphed? Which hydrocarbon has the strongest carbon-carbon bond?

4.) a.) Given that the condensed molecular formula for the following compound, CSH120, predict the bonds you would expect this molecule to have based on the given IR spectrum. Draw arrows to the peaks with the bond(s) they represent. b.) Based on your findings from the IR spectrum, propose 3 different constitutional isomers that are consistent with your findings. 3000 ecoo 1000 sto 1380 34 1343 62 509 77 3346 3336 10 10 2066 12 3017 36 3326 10 2969 2912 1274 68 1236 70 1203 3007 35 49 GO 2006 1468 1117 1077 25 104 00 130 67 20

Why are the C2H7 molecular formula impossible?

Determine a molecular formula, e.g. CH4, from the line structure below. Specify elements in the following order: C, H, others(in alphabetical order). Example: C,H; CIOS Molecular formula

why are there 0 sites of unsaturation? wouldnt there be 1?

Specify whether the two structures are resonance contributors to the same resonance hybrid. Be sure to explain your reasoning. If yes, be sure to specify which is preferred and why. H2C=NH2

NH2 NH2 Assign a configuration (R,S) for each of the carbon atoms labelled with a red number in the figure on the left. Your answer must be entered in the following format: X,X,X,[...] (no spaces between commas and letters, and no period), where X corresponds to the configuration (input an N if the center isn't chiral), in numerical order of atoms. Attribuez une configuration (R,S) à chacun des atomes de carbone marqués d'un chiffre rouge dans la figure de gauche. Votre réponse doit être saisie dans le format suivant: X,X,X,[...] (sans espace entre les virgules et les lettres, et sans point), où X correspond à la configuration (entrez un N si le centre n'est pas chiral), dans l'ordre numérique des atomes.

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