1. Application to Boiling Points of Alkanes - Toropov, Toropova, et al.Toropov A, Toropova A, Ismailov T, Bonchev D. 3D weighting of molecular descriptors for QSPR/QSAR by the method of ideal symmetry (MIS). 1. Application to boiling points of alkanes. J Mol Struct THEOCHEM 1998 ...
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...
6.1. Learners investigate factors that influence the boiling points of alkanes and alcohols. In one of the investigations they determine the boiling points of the first three alkanes.6.1.1. Write down an investigative question for this investigation. (2)6.1.2. Fully explain why the boiling point...
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 ...
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...
The boiling and freezing points of water enable the molecules to be very slow to boil or freeze, this is important to the ecosystems living in water. If water was very easy to freeze or boil, drastic changes in the environment and so in oceans or lakes would cause all the organisms ...
b. What effect does branching of an alkane chain has on its melting point ? View Solution what is boiling point ? View Solution what is boiling point ? View Solution What is the effect of branching on melting and boiling points of alkanes ? View Solution ...
Choose the correct order for the boiling points of amines View Solution Select the increasing order of their boiling point. View Solution As the number of carbon atoms in a chain increases the boiling point of alkanes View Solution Which (isomeric ) amine has lowest boiling point? View Solutio...
Methanolhas a Boiling point of 64.7°C (148.5 °F; 337.8 K) Boiling Point of Milk The cow's milk's boiling point is about 203 ° F (95 ° C) Boiling Point of Alcohol The boiling points of alcohols of equal molecular weights are much higher than those of alkanes. Ethanol, for exampl...
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...