the technology billionaire pursued a sale of struggling electric-car company tesla to google in 2013 for $ 6 billion .
musk demanded that he be permitted to run tesla as a unit of google for eight years , or until tesla produced a third-generation car .
negoitations promptly ended in may 2013 when his company unexpectedly yielded its first profit and he no longer needed the finanical support .
the claims are made in the new biography elon musk : tesla , spacex and the quest for a fantastic future .