Question 1 a) This question concerns the theoretical molecule xenon thiotetrafluoride, XeSF4. i) Draw a Lewis diagram in wedge-and-dash form showing the shape of XeSF4. Your diagram must include ALL pairs of electrons. What is the name of this shape? ii) Silicon disulphide, SiS2, can exist as linear molecules with this Lewis structure: S=Si S The Pauling electronegativities of silicon and sulphur are 1.9 and 2.58, respectively. Use this to explain why there are no dipole-dipole interactions between molecules of SiS2. b) Butan-1-ol is very soluble in water: 73g of butanol can be dissolved in one dm³ of water at room temperature. However, at the same temperature, octan-1-ol has a very low solubility in water (0.3 g dm-³). Explain this observation in terms of intermolecular forces. c) Write equations to represent the following processes (state symbols are required) i) the enthalpy of formation of carbon monoxide ii) the enthalpy of (complete) combustion of ethanal iii) the formation of the CH3 (g) radical by the reaction of methane and chlorine gases
Types of Chemical Bonds
The attractive force which has the ability of holding various constituent elements like atoms, ions, molecules, etc. together in different chemical species is termed as a chemical bond. Chemical compounds are dependent on the strength of chemical bonds between its constituents. Stronger the chemical bond, more will be the stability in the chemical compounds. Hence, it can be said that bonding defines the stability of chemical compounds.
Polarizability In Organic Chemistry
Polarizability refers to the ability of an atom/molecule to distort the electron cloud of neighboring species towards itself and the process of distortion of electron cloud is known as polarization.
Coordinate Covalent Bonds
A coordinate covalent bond is also known as a dative bond, which is a type of covalent bond. It is formed between two atoms, where the two electrons required to form the bond come from the same atom resulting in a semi-polar bond. The study of coordinate covalent bond or dative bond is important to know about the special type of bonding that leads to different properties. Since covalent compounds are non-polar whereas coordinate bonds results always in polar compounds due to charge separation.
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