Negotiate with russia? You can’t negotiate with terrorists and Putin is a terrorist and wanted war criminal. Any agreement you reached with them would not be worth the paper it was written on. The russians are naked aggressors and (in only the context of Ukraine) historical treaty-breakers with a long track record of violating treaties they were signatories to. These include, but are not limited to:
In addition, russia has committed an untold numbers of war crimes in Ukraine. These include, but are not limited to:
Any negotiations with the russians is a tacit acceptance of these.