Which molecule below is the chemical commonly referred to as Roundup?

Question

BlackTom AI · Accepted Answer

To determine which structure corresponds to the chemical commonly known as Roundup, I will examine each option in turn and relate it to glyphosate’s known features.
Option A shows a steroid-like framework with multiple ring systems and a hydroxyl group, which is characteristic of steroid molecules and not related to herbicides like glyphosate. The presence of a fused ring system and a distinct steroid backbone makes this an unlikely match for Roundup's active ingredient.
Option B features a heteroaromatic ring (a six-membered ring with nitrogen) attached to a carboxyl group and chlorine substituents. This arrangement resembles a chlorinated aromatic acid derivative, not glyphosate, which is not a primarily aromatic or highly halogenated compound.
Option C depicts a fused aromatic system with two amine groups and bulky substituents on a tricyclic scaffold. This type of structure is more aligned with complex organic dyes or certain anticancer agents, rather than an herbicidal molecule like glyphosate. Therefore, it does not fit Roundup.
Option D presents a molecule with a central amide linkage and a phosphonic acid moiety (P=O with OH groups), joined to an amino acid backbone. This configuration is emblematic of N-(phosphonomethyl)glycine, the chemical name for glyphosate, which is the active ingredient in Roundup. The phosphonomethyl group attached to glycine matches glyphosate’s canonical structure.
Option E shows a tricyclic framework bearing a cyclopropyl-like ring and several carbonyl groups, which resembles a different class of compounds (possibly quinolone-like or other heterocyclic drugs). It does not align with glyphosate’s simple glycine core with a phosphonate substituent.
In summary, among the options, only D matches the structural features of glyphosate (Roundup’s active ingredient): a glycine backbone bearing a phosphonate group. The other structures correspond to unrelated classes of molecules and do not represent glyphosate.

CHEM151_WI25_A00 Chem151-Midterm

Which molecule below is the chemical commonly referred to as Roundup?

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