MOLECULAR POLARITYFIELD NOTE 24 / 175

Is C2H5NO2 polar or nonpolar?

Glycine (C2H5NO2) is polar because its amino and carboxylic-acid groups occupy different ends.

THE ANSWERPolar.

Glycine · tetrahedral amino C; planar carboxyl C

FIGURE 01

The molecule in space

Drag to turn the molecule. Show angles to read the model geometry.

STRUCTURE / 01
O ×2N ×1C ×2H ×5
HHHONOCCHH
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01 / MODEL RECORDPubChem 3D coordinates. Atom sizes and bond thickness are illustrative.How model data is used ↗

THE REASONING

Why C2H5NO2 is polar

The neutral glycine structure has NH2–CH2–COOH connectivity. Both the nitrogen-containing end and the oxygen-rich carboxyl end contribute to an uneven charge distribution.

A USEFUL DISTINCTION

What to notice

In water near neutral pH, glycine is commonly a zwitterion, NH3+–CH2–COO−. The 3D model here represents PubChem's neutral molecular record, not that aqueous ionic form.

QUICK REFERENCE

Common questions about C2H5NO2

  1. 01
    What does the Lewis structure of C2H5NO2 show?

    The neutral Lewis connectivity is H2N–CH2–C(=O)–OH. Nitrogen has a lone pair, and both oxygens have lone pairs; the carboxyl carbon is trigonal planar.

  2. 02
    What is the molecular geometry of C2H5NO2?

    C2H5NO2 has a tetrahedral amino C; planar carboxyl C molecular geometry. The 3D model shows representative bond angles of 111.9° and 110° and 106.5°. These angles come from the displayed model coordinates.

  3. 03
    What is the molar mass of C2H5NO2?

    C2H5NO2 has an approximate molar mass of 75.07 g/mol, calculated from its formula using abridged standard atomic weights. Natural isotope variation can change the last digits.

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