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Question
Predict the shape and bond angles in the following molecule:
HCN
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Solution
There are two bond pairs on the central atom. Hence, the shape of HCN is linear and the H–C–N bond angle is 180°.
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| Examples | C2H6 Ethane | C2H4 Ethene | C2H2 Ethyne |
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\[\begin{array}{cc} \backslash \phantom{......}/\phantom{.}\\ \ce{—C – C —}\\ /\phantom{......}\backslash\phantom{.}\end{array}\] |
\[\begin{array}{cc} \backslash \phantom{......}/\\ \ce{C \text{=} C}\\ /\phantom{......}\backslash\end{array}\] |
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| BeCl2 | 180° | ||
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| C2H2 |
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