Datasets:

SpectrumWorld
/

opendatalab-experimental-nmr-peaks

license: mit
task_categories:
  - other
language:
  - en
tags:
  - chemistry
  - nmr
  - spectroscopy
  - experimental
  - molecular-formula
  - smiles
size_categories:
  - 100K<n<1M

OpenDataLab Experimental NMR Peaks Dataset

Dataset Description

This dataset contains experimental NMR (Nuclear Magnetic Resonance) peak sequences extracted from the OpenDataLab experimental spectra database. The dataset includes both H-NMR and C-NMR peak sequences for chemical compounds, along with their SMILES representations and molecular formulas.

Dataset Summary

Total Samples: 533,595 compounds
Batches: 333 batch files
Data Source: Experimental spectra from OpenDataLab
Format: Parquet files (one file per batch)

Data Fields

Each sample contains the following fields:

smiles: Standardized SMILES string representation of the molecule
molecular_formula: Molecular formula (e.g., "C9H12O6")
h_nmr_peaks_sequence: Space-separated H-NMR peak positions (2 decimal places)
- Empty string if H-NMR data is not available
c_nmr_peaks_sequence: Space-separated C-NMR peak positions (2 decimal places)
- Empty string if C-NMR data is not available
source: Data source identifier, always "experimental" for this dataset

Data Structure

The dataset is organized into 333 parquet files, each corresponding to a batch:

batch_0000_peaks.parquet
batch_0001_peaks.parquet
...
batch_0332_peaks.parquet

Usage

from datasets import load_dataset

# Load the dataset
dataset = load_dataset("SpectrumWorld/opendatalab-experimental-nmr-peaks", split="train")

# Access a sample
sample = dataset[0]
print(sample)
# {
#     'smiles': 'O=CC1(O)CC(O)(C=O)CC(O)(C=O)C1',
#     'molecular_formula': 'C9H12O6',
#     'h_nmr_peaks_sequence': '9.96 9.96 9.96',
#     'c_nmr_peaks_sequence': '',
#     'source': 'experimental'
# }

Dataset Statistics

Total compounds: 533,595
Average per batch: ~1,602 compounds
Batch size range: 545 - 3,170 compounds
H-NMR data availability: Most samples have H-NMR data
C-NMR data availability: Some samples have C-NMR data

Data Processing

The dataset was processed from the original experimental spectra data:

Extracted NMR peak sequences from parsed chemical shift data
Calculated molecular formulas from SMILES using RDKit
Formatted peak sequences to 2 decimal places
Added source identifier for data provenance

Citation

If you use this dataset, please cite:

@dataset{opendatalab_experimental_nmr_peaks,
  title={OpenDataLab Experimental NMR Peaks Dataset},
  author={SpectrumWorld},
  year={2024},
  url={https://huggingface.co/datasets/SpectrumWorld/opendatalab-experimental-nmr-peaks}
}

License

This dataset is released under the MIT License.