Chemistry, 16.07.2020 14:01 naomicervero

1. Name the following alkanes.

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Answer from: JoeyDoesMath2399

a. 2-methyl-propane.

b. 2-methyl-butane.

c. 4-ethyl-heptane.

d. 4-methyl-3-ethyl-heptane.

e. 3,3,5-trimethyl-heptane.

f. 2-dimethyl-butane.

g. 2-dimethyl-propane.

h. 3-diethyl-pentane.

Explanation:

Hello, for IUPAC rules, take into account that for numbering the organic chain, we must start by the carbon havinf the closest radical to it. Moreover, for naming, we can name alphabetically or by complexity order as shown below:

a. In this case, we consider the middled methyl as a radical in the three-carbon chain, therefore, IUPAC name is 2-methyl-propane.

b. In this case, we consider the methyl at the second carbon in the four-carbon chain (longest one), therefore IUPAC name is 2-methyl-butane.

c. In this case, we consider the ethyl at the fourth carbon in the seven-carbon chain (longest one), therefore IUPAC name is 4-ethyl-heptane.

d. In this case, we consider the ethyl at the third carbon and the methyl at the fourth carbon in the seven-carbon chain (longest one), therefore IUPAC name is 4-methyl-3-ethyl-heptane.

e. In this case, we consider the three at the third and fifth carbons in the seven-carbon chain (longest one), therefore IUPAC name is 3,3,5-trimethyl-heptane.

f. In this case, we consider the two methyles at the second carbon in the four-carbon chain (longest one), therefore IUPAC name is 2-dimethyl-butane.

g. In this case, we consider the two methyles at the second carbon in the three-carbon chain (longest one), therefore IUPAC name is 2-dimethyl-propane.

h. In this case, we consider the two ethyles at the third carbon in the five-carbon chain (longest one), therefore IUPAC name is 3-diethyl-pentane.

Best regards.

Answer from: Quest

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence, the electronegativity (or the ability to attract electrons) is lessened."

Answer from: Quest

the answer is barium and copper bromide

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1. Name the following alkanes.
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