Alpha beta of unsaturated cobonyn with organomagnesium​

Ocean water is salty due to the presence of dissolved salts in the ocean waters. The two major ions present in oceans are sodium() and chloride (ions. Positive ions like in the oceans are due to the weathering of rocks and minerals in the Earth's crust which are brought into the ocean by river water. Anions come from atmosphere mostly. Like sulfate ion is formed by the reaction of sulfur trioxide,water and oxygen in atmosphere. The halide ions present in the oceans are not derived from the weathering of the rocks in the Earth's crust. They are derived from the gases released during volcanic eruptions. The gases released during volcanic eruptions are dissolved in water and are washed into the ocean. These gases include halogens like chlorine. So the most likely source of chloride ions in ocean waters is gases from volcanic eruptions.