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PF3Cl2 can form isomers, some of which are polar and one of which is non-polar. Deduce the three-dimensional arrangement of one non-polar isomer and of one polar isomer of PF3Cl2 by stating the positions, axial or equatorial, of the two chlorine…
An aqueous solution of copper(II) sulfate is blue because of the [Cu(H2O)6]2+ ion. Use section 15 of the data booklet if needed. Which statement best explains the colour? A. Blue light is absorbed when electrons are promoted between split d orbitals…
This reaction could proceed through either an SN1 or an SN2 mechanism, depending on the reaction conditions. Sketch a graph of the rate against the nucleophile concentration, [OH−], for each of the mechanisms on the axes…
Starting from a single enantiomer of 2-bromopentane, only one enantiomer of the alcohol product, pentan-2-ol, is obtained. Suggest, with a reason, whether the reaction follows an SN1 or an SN2 mechanism.
State the name of an instrument that could be used to determine whether the pentan-2-ol obtained is a single enantiomer or a racemic mixture.
State, with a reason, how the rate of reaction of hydroxide ions with 2-iodopentane compares with the rate of their reaction with 2-bromopentane under the same conditions.
2-Bromopentane also reacts with cyanide ions, CN−, by the same mechanism as the one identified in (b). Explain this mechanism using curly arrows to represent the movement of electron pairs.
(i) Deduce the number of signals and the ratio of the areas under the signals in the NMR spectrum of 2-bromopentane. Number of signals: Ratio of areas: (ii) Identify the splitting pattern of the signal of (A) the hydrogen atoms of the methyl group…
Which elements are metalloids? I. Silicon II. Antimony III. Bismuth A. I and II only B. I and III only C. II and III only D. I, II and III
Which property of the elements generally increases from left to right across period 3 and decreases down group 17? A. Atomic radius B. Electronegativity C. Metallic character D. Ionic radius