Crystalline Sponge Index

MOLECULE INPUT

Start with a molecule.

CS-index estimates the ease of structure determination using the crystalline sponge method.

Enter a name, CAS number or SMILES. Priority: SMILES → CAS → name.

Random molecules are sampled live from ChEMBL.

Your score comes first.

The molecular heatmap follows as soon as it is ready.

PREDICTION RESULT

Your molecule

CS-index
Your molecular structure will appear here.

Enter a molecule to get started.

MOLECULAR IMAGE

Your molecule

Enlarged molecular structure

Transparent PNG · Original image resolution

ABOUT THE INDEX

Understanding the CS-index

The crystalline sponge method has achieved successful structure determinations of more than 200 molecules.

Explore successful cases in Crystalline Sponge Gallery

CS-index
Crystalline Sponge Structure Determination Index

A prediction before the experiment

The CS-index is a model-derived score informed by molecules successfully characterized using the crystalline sponge method. It evaluates molecular structure to estimate the potential for obtaining a resolvable structure under standard experimental conditions, with minimal optimization.

How to read the score

Higher scores
Suggest greater potential for straightforward structure determination, with less experimental optimization.
Lower scores
Suggest that more condition screening and optimization may be needed. They do not rule out successful structure determination.

Use the score to prioritize candidates and plan experiments. It does not predict a specific number of optimization attempts.

What the heatmap shows

Gold highlights atomic contributions that raise the model score; blue highlights contributions that lower it. The map explains the model’s prediction for this molecule. It does not directly measure binding sites, interaction energies or experimental mechanisms.

Scope and interpretation

The displayed percentage represents a model score, not a calibrated experimental success rate. An 80% CS-index does not mean an 80% chance of success.

Interpret the score within the crystalline sponge system and molecular data represented by this model. Actual outcomes also depend on experimental conditions and data quality. A high score is a promising starting point, not a guarantee of structure determination.