(Trialkylstannyl)cuprates: A spectroscopic and chemical investigation

✍ Scribed by Sunaina Sharma; Robin A. Martin

• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: English
• Weight: 726 KB
• Volume: 5
• Category: Article
• ISSN: 1042-7163
• DOI: 10.1002/hc.520050503

✦ Synopsis

Lotv-temperature IH, "C, and "9Sn N M R spectroscopic techniques were used to probe the nature of cuprates dei-ived from Me$nLi, CLICN, or CuBr . Me-S.

In THF, addition of Me,SnLi and Ctrx IX = Br or C N ) gives aggregated [Me,SnCu . L a , , . When the ratio of stannyl anion to cuprous cation is 2 : 1 , mixtures of (Me3Sn),Cu2Li, (Me,Sn)2CuLi. L X , and (Me,Sn),CuLi2 are formed. This behavior is unlike either homo trialkylsilylcyanocuprates, which form (R3Si)2Cu(CN)Li2 at 2: 1 ratios of silyl anion to cuprous ion, or mixed trialkylstannyl-or trialkylsilylcuprates, which exist as (R,M)Cu(R')(CN)Li, (M = Si or S n and R' = Me or Bu). (R,Sn),CuLi, is the major species when the stannyl anion to cuprous cation ratio reaches 3 : l . On the other hand, the analogous magnesium cuprates are discrete species i n solution and possess differential reactivity.