OPERA Model Calculation Details: Vapor Pressure

Structural image of 4'-Hydroxy-2-methoxy[1,1'-biphenyl]-4-carboxylic acid
Chemical Identifiers
Preferred name: 4'-Hydroxy-2-methoxy[1,1'-biphenyl]-4-carboxylic acid
DTXSID: DTXSID80688724
DTXCID: DTXCID80639473
CASRN: 1261901-65-8
Molecular weight: 244.246
Model Results
Model name: OPERA_VP
Model source: OPERA2.8
Property name: Vapor Pressure
Property description: The pressure exerted by a vapor in thermodynamic equilibrium with the liquid phase in a closed system at a given temperature
Experimental value: Experimental value from OPERA2.8
 N/A
Predicted value: Predicted value from the model
1.82E-09 mmHg
Confidence level:  Confidence level is calculated from the accuracy of the predictions of the five nearest neighbors weighted by their distance to the query chemical
0.477
Combined applicability domain:  Combined applicability domain from multiple AD measures
Inside training set (
Global AD  Global applicability domain via the leverage approach
= 1) but poor local representation (
Local AD index Local applicability domain index is relative to the similarity of the query chemical to its five nearest neighbors from the training set
= 0.366 ≤ 0.4)
Model Performance
Vapor Pressure Model Results Histogram of Vapor Pressure Data
Weighted kNN model statistics
Training (75%) 5-fold CV (75%) Test (25%)
R2 RMSE Q2 RMSE R2 RMSE
0.91 1.08 0.91 1.08 0.92 1.0

Model summary in QSAR Model Reporting Format (QMRF)
Nearest Neighbors from Model Knowledge Base
Neighbor: 1
Measured:  5.01E-11 mmHg
Predicted: Five fold cross validation prediction for the neighbor
 6.76E-10  mmHg

Structural image of C.I. Disperse Yellow 3
C.I. Disperse Yellow 3

 Neighbor: 2
Measured:  7.59E-08 mmHg
Predicted: Five fold cross validation prediction for the neighbor
 7.08E-10  mmHg

Structural image of Bifenazate
Bifenazate

 Neighbor: 3
Measured:  2.45E-08 mmHg
Predicted: Five fold cross validation prediction for the neighbor
 1.62E-10  mmHg

Structural image of 1,4-Dihydroxyanthracene-9,10-dione
1,4-Dihydroxyanthracene-9,10-dione

 Neighbor: 4
Measured:  3.02E-10 mmHg
Predicted: Five fold cross validation prediction for the neighbor
 9.77E-10  mmHg

Structural image of Triflumuron
Triflumuron

 Neighbor: 5
Measured:  8.91E-10 mmHg
Predicted: Five fold cross validation prediction for the neighbor
 1.05E-10  mmHg

Structural image of Diflubenzuron
Diflubenzuron