The phrase "a time when negotiating" is correct and usable in written English.
It can be used to refer to a specific period or instance during which negotiations are taking place or were relevant.
Example: "There was a time when negotiating was essential for reaching a consensus on the project."
Alternatives: "a moment for negotiation" or "an occasion for negotiating".
As Mrs. Whitman will discover, there will be times when negotiating skills simply don't suffice.
But then Strada negotiated with the Taliban at a time when Nato said negotiating with the Taliban was impossible, in order to operate a hospital behind their frontlines.
Cheikh Ahmed said the attack took place "amid significant progress in the long peace negotiations, and at a time when we were negotiating a durable accord".
"You don't want to celebrate too much at a time when you're negotiating new contracts," said Gitesh Pandya, publisher of Box Office Guru, a Web site about the movie business.
Reid's announcement comes at a time when Iranian officials, negotiating in Geneva with a group of six world powers that include the United States, have been complaining that they are being pushed too far.
The political storm over the scandal has put Obama on the defensive at a time when he is negotiating with Republicans on a budget deal and trying to push a comprehensive immigration reform bill through Congress.
At a time when Britain is torturously negotiating its way out of the European Union, there suddenly seemed to be many ways to interpret the gift.
In his written evidence, Blair denied he at any time tried to halt compensation for IRA victims at a time when the US was negotiating on behalf of victims of the Lockerbie bombing.
The disruption in the cocaine supply comes at a time when the United States and Mexico are negotiating an agreement to provide Mexico with hundreds of millions of dollars to better equip and train its police departments.
But the prospect of new elections for those seats could undermine political stability in Greece at a time when Mr. Samaras is negotiating with creditors for continued financial aid as part of two multibillion-dollar bailouts Greece has already received — even as speculation about the possible need for a third bailout hangs over the talks.
