We have used a Ligand Knowledge Base for bidentate P. P-donor ligands of potential interest to homogeneous catalysis to compare three dimensionality reduction techniques. namely Principal Component Analysis (PCA). Uniform Manifold Approximation and Projection (UMAP) and t-distributed Stochastic Neighbor Embedding (t-SNE). https://allfixelectricales.shop/product-category/vacuum-extension-pipe/