Which of the following methods is LEAST helpful in identifying chiral [KYE-ruhl] isomers?

W) X-ray diffraction

X) Quadrupole [QUAD-roo-pole] mass spectrometry [spek-TRAW-metry]

Y) Nuclear magnetic resonance spectroscopy [spek-TRAW-scuh-pee]

Z) Raman [RAH-min] spectroscopy
X) QUADRUPOLE MASS SPECTROMETRY