Chemistry, 19.03.2020 01:36 MaTh8809

Click the "draw structure" button to launch the drawing utility. Draw the structure of the major organic product isolated from the reaction of 3-hexyne with hydrogen (1 mol), Lindlar palladium.

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Answer from: smagallanes

cis-hex-2-ene as produced as major product.

Explanation:

In presence of $Pd/BaSO_{4}$ (Lindlar catalyst) and $H_{2}$ , alkynes are reduced to alkene. $H_{2}$ molecules first adsorbed onto metal surface through chemisorption.When alkyne molecule comes in close proximity to the metal surface, H atoms add onto triple bond to reduce it to alkene.Two H atoms add onto alkyne from same face of metal. So, (Z) or cis-isomer of alkene is produced as a major product.Reaction mechanism has been shown below.
Click the draw structure button to launch the drawing utility. Draw the structure of the major org

Click the draw structure button to launch the drawing utility. Draw the structure of the major org

Answer from: Quest

a. a clone will be physically identical to the original, but won’t be genetically identical

have a good day!

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

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