Match each of the following structures with the IR data that correspond best. Abbreviations: w. weak; m,

Question:

Match each of the following structures with the IR data that correspond best. Abbreviations: w. weak; m, medium: s, strong; br, broad,
(a) 905 (s), 995 (m), 1040 (m), 1640 (m), 2850-2980 (s), 3090 (m), 3400 (s, br) cm-1;
(b) 2840 (s), 2930 (s) cm-1;
(c) 1665 (m), 2890-2990 (s), 3030 (m) cm-1;
(d) 1040 (m), 2810-2930 (s), 3300 (s, br) cm-1.