4. An unknown compound gives an M peak in mass spectrometry of 86, with a small M+1 peak. The IR and NMR spectra are brought here. What is the molecular formula of the unknown compound? What functional groups are present in the compound? What is the compound's structure? Hint: The molecule was prepared using a hydration reaction on an alkyne. 100 2973 33 2936 64 2877 06 1710 4 1468 52 1447 74 1426 74 1986 64 1357 43 1207 6 1290 B 1192 5B 1144 57 1100 66 1076 86 955 77 805 84 694 86 D 4000 3000 2000 1500 1000 500 MAVENUMBER Integration: 1:3 : 6 11 10 9 8 7 6 5 4 3 2 1 0 HSP-00-031 ppm