The IR spectrum of 1- hexyne shows a sharp absorption peak near 2100 cm-1 owing to the CC triple bond stretch. The IR spectrum of 3- hexyne shows no absorption in this region because______

a.) 1- hexyne is non- polar whereas 3- hexyne is polar
b.) 1- hexyne possesses a change in dipole moments whereas 3- hexyne does not
c.) 1- hexyne is symmetrical whereas 3-hexyne is not
d.) 1- hexyne has a higher molecular weight than 3- hexyne