Assertion: hypophosphorous acid | /r/HasProperty | figure 35
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text: Phosphinic acid derivatives (also identified as phosphonous acid) are prepared by reaction of hypophosphorous acid (Figure 35) on alkene or alkyne (hydrophosphonation) , by its addition on aldehyde or imine  or by hydrolysis of alkyl or aryldichlorophosphine (RPCl 2 )  (for a review see reference ).