The French leader wants to give Vladimir Putin an “exit ramp”, but Ukraine rejects that stance.
Ukraine’s foreign minister has hit out at French President Emmanuel Macron after he said it was vital that Russia was not humiliated over its invasion.
Mr Macron said it was crucial President Vladimir Putin had a way out of what he called a “fundamental error”.
But Dmytro Kuleba said allies should “better focus on how to put Russia in its place” as it “humiliates itself”.
Mr Macron has repeatedly spoken to Mr Putin by phone in an effort to broker a ceasefire and negotiations.
The French attempts to maintain a dialogue with the Kremlin leader contrast with the US and UK positions.
Foreign minister Kuleba said in a tweet that “calls to avoid humiliation of Russia can only humiliate France and every other country that would call for it”.
Kyiv says Russia must not get territorial concessions from Ukraine, as the Russian invasion has been condemned internationally as brutal aggression.
Earlier, Mr Macron told French regional media that Russia’s leader had “isolated himself”.
“I think, and I told him, that he made a historic and fundamental error for his people, for himself and for history,” he said.
“Isolating oneself is one thing, but being able to get out of it is a difficult path,” he added.
Italy’s Prime Minister Mario Draghi has aligned himself with Mr Macron, suggesting Europe wants “some credible negotiations”.
Fierce fighting in Severodonetsk
The eastern city of Severodonetsk remains the epicentre of fighting in Ukraine, with Ukrainian forces fiercely resisting Russian tanks, infantry and intense artillery barrages.
Capturing the city would deliver the Luhansk region to Russian forces and their local separatist allies, who also control much of neighbouring Donetsk region.
The region’s Ukrainian governor Serhiy Haidai said his forces had reclaimed about a fifth of Severodonetsk and could hold on.
“As soon as we have enough Western long-range weapons, we will push their artillery away from our positions. And then, believe me, the Russian infantry, they will just run,” he said.
The US plans to give Kyiv’s forces precision rocket systems, so that they can hit Russian positions from a longer range. The UK will also send them a number of large multiple-rocket batteries.
Facing Severodonetsk across the Siverskyi Donets river lies Lysychansk. Both cities are strategically important for Russia: Severodonetsk has the giant Azot chemical plant, which produces nitrogen-based fertilisers, and Lysychansk has Ukraine’s second biggest oil refinery.
The fighting has now left most of Severodonetsk in ruins, but thousands of civilians are still sheltering in basements there.
Governor Haidai said Russian forces were blowing up bridges on the river to prevent Ukraine bringing in military reinforcements and delivering aid to civilians.
In other developments:
- The Russian military said it had shot down a Ukrainian military transport plane carrying weapons near the Black Sea port of Odesa
- Russia continued heavy shelling of Mykolaiv, a key port city on the approaches to Odesa – the BBC’s Laura Bicker met shaken but determined civilians there
- A major fire engulfed a wooden church at the Sviatohirsk Lavra Monastery in Donetsk region; Ukraine blamed Russian shelling, which Russia denied, instead blaming it on retreating Ukrainian troops.