That's not a private key..  
 
It's an extended public key (xpub). See https://bitcoin.stackexchange.com/a/36958 It might be better not to randomly post these online.

Can you show us where exactly you are able to find your transaction ID? maybe a link to a block explorer? Otherwise we can only guess what you could possibly do.


It sounds to me like you might have downloaded a fake version of Electrum, which took your money and is now showing imaginary transaction IDs.