The Wiener index of a graph, introduced by Harold Wiener in 19475, was the first graph parameter to be used in chemistry. In particular, it was used to predict boiling points of alkanes. Ever since its introduction, a lot of effort was invested in research that gave rise to the developmen...
Ruban, Extended molecular con- nectivity: predication of boiling points of alkanes. J. Struct. Chem. 38, 965-969 (1997)Toropov, A. A.; Toropova, A. P.; Ismailov, T. T.; Voropaeva, N. L.; Ruban, I. N. Extended Molecular Connectivity: Prediction of the Boiling Points of ...
ALKANESFIX-point estimationPOINT set theoryFORECASTINGA general perception among researchers is that boiling points, which is a key property in the optimization of lubricant performance, are difficult to predict successfully using a single-parameter model [5, 6]. In this contribution, we propose a ...
Relations between the boiling points of perfluoro-ethers, perfluoroalkanes and normal alkanes The non-available boiling points of the higher perfluoroalkanes have been estimated from the relationship T F = 0.247 T H 脳 M F / M H where T F and T H ... AA Woolf - 《Journal of Fluorine ...
The boiling points of alkanes increase systematically with their molar mass because of the increase in {Blank}. As the temperature of a liquid or solid increases, its vapor pressure (increases, decreases). Vapor pressure (increases, decreases) as the ...
What is the effect of branching on melting and boiling points of alkanes ? For the same number of C atoms,increased branching leads to a more compact molecule that can pack more clocely into a crtstal lattice. The intermolecular van der Waals forces of attraction are stronger and have higher...
Approach to Estimation and Prediction for Normal Boiling Point (NBP) of Alkanes Based on a Novel Molecular Distance-Edge (MDE) Vector, λ Models that estimate and predict the normal boiling point (NBP) of alkanes based on a molecular distance-edge (MDE) vector, 位, have been developed by ...
The boiling point of alkanes is influenced by:- Molecular mass: Higher molecular mass generally leads to a higher boiling point.- Surface area: Increased surface area enhances van der Waals forces, leading to higher boiling points.- Branching: More branching in the molecular structure decreases ...
How do impurities affect the boiling point of a liquid? Why does cold metal conduct electricity better than warm metal? Explain why the melting point depresses and broadens when a sample is impure. Explain why alcohols have higher boiling points as compared to their corresponding alkane...
The efficiency of the approach is demonstrated through a case study dealing with the design of a model structure–property relationship for boiling points of alkanes. The data set was analysed by multiple linear regression.doi:10.1007/s008940100012Mohamed Nohair...