Coordination Chemistry I - Chapter 1

Coordination Nomenclature Sprint

Master IUPAC naming with structure-first challenges. Build precision, not guesses.

Session mode

Streak target 10
Timer Off
Geometry cues On
Adaptive mode
Rigor mode

Difficulty

Skill focus

  • Ligand ordering and prefixes
  • Oxidation state inference
  • Charge balance and counter ions
  • Geometry recognition

Nomenclature rules at a glance

  • List ligands alphabetically by ligand name (ignore prefixes).
  • Neutral ligands keep name; anionic ligands end in -o.
  • Anionic complexes use metal name with -ate ending.
  • Metal oxidation state in Roman numerals.
  • Use cis/trans, fac/mer, kappa, and mu for structure when needed.

Naming workflow

IUPAC naming workflow for coordination compounds

Ligand denticity

Examples of bi-, tri-, tetra-, penta-, hexa-, hepta-, and octadentate ligands
2D structure Core Octahedral

[Cr(NH3)4Cl2]Cl

Provide the full IUPAC name. Include oxidation state, ligand order, and counter ion.

3D model

3D view shows coordination geometry and ligand positions.

Streak 0
Accuracy 0%
Questions 0

How the sprint works

Each prompt gives a coordination formula and a visual cue. Type the IUPAC name following ligand ordering, multiplicative prefixes, and oxidation state in parentheses. Adaptive mode queues a similar prompt after a miss.

Scoring

The grader checks ligand order, ligand identity, metal name, oxidation state, and counter ion. Small punctuation differences are forgiven; ordering mistakes are not.

Next upgrades

Add the "Build It" mode: drag ligands onto a geometry scaffold and earn points for correct coordination number and naming.