Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 4020-99-9, C13H13OP. A document type is Patent, introducing its new discovery., SDS of cas: 4020-99-9
Phosphine oxide of the formula selected from the group consisting of STR1 wherein X is H, alkylthio of 1-4 carbon atoms, or STR2 Y is H, alkyl of 1-4 carbon atoms, Cl, Br, or STR3 Z is H, alkyl of 1-4 carbon atoms, or STR4 at least one of X, Y, and Z in the formula in which all three symbols appear is STR5 Q is H or Br; each of A and A’ is selected independently from H and alkyl of 1-4 carbon atoms, or A and A’ taken jointly is CH=CH–CH=CH; each of D and D’ is selected independently from H and CN, or D and D’ taken jointly is CH=CH–CH=CH; and each R is selected independently from alkyl of 1-4 carbon atoms, cycloalkyl of 5-6 carbon atoms, benzyl, phenyl, tolyl, and chlorophenyl.
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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate