Which chemical reactions don't involve bond breaking? Watch

jayjayfucopil
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I recently came across a question in which an option is 'Breaking a chemical bond is the first step in any chemical reaction', which lead me to think of reactions which do not involve bond breaking. The only reaction I can think of is dimer formation, but a Google search reveals no more. Surely this cannot be the only example?
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Kian Stevens
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(Original post by jayjayfucopil)
I recently came across a question in which an option is 'Breaking a chemical bond is the first step in any chemical reaction', which lead me to think of reactions which do not involve bond breaking. The only reaction I can think of is dimer formation, but a Google search reveals no more. Surely this cannot be the only example?
If you're on about polymer dimers, then dimer formation definitely involves bond breaking as it's a condensation reaction.
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charco
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(Original post by jayjayfucopil)
I recently came across a question in which an option is 'Breaking a chemical bond is the first step in any chemical reaction', which lead me to think of reactions which do not involve bond breaking. The only reaction I can think of is dimer formation, but a Google search reveals no more. Surely this cannot be the only example?
Some reactions that involve the formation of dative coordinate bonds.

As you state, some dimerisation reactions,

2AlCl3 --> Al2Cl6

Reactions involving free radical molecules may also not involve breaking bonds:

2NO2 --> N2O4

Protonation of bases etc.
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