| 41. | The ethylene ligands are labile and readily displaced even by other alkenes.
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| 42. | To do so, the best-known methods are hydrogenation of alkenes:
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| 43. | Almost all industrial processes involving alkene-derived polymers rely on organometallic catalysts.
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| 44. | The polymerization reaction of alkenes occurs similarly to the reactions in metallocene catalysts:
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| 45. | Benzene undergoes substitution reactions, rather than addition reactions as typical for alkenes.
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| 46. | Alkenes and aromatics were held to very low levels.
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| 47. | Ordinary alkenes are not susceptible to a nucleophilic attack ( apolar bond ).
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| 48. | Steam cracking is used in the petroleum industry to produce the lighter alkenes.
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| 49. | In addition, the alkene to alkane ratio increases.
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| 50. | The most commonly used dipolarophiles are alkenes and alkynes.
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