<p>Iranian President Hassan Rouhani said Wednesday that talks in Vienna on rescuing a troubled 2015 nuclear deal had opened a "new chapter".</p>.<p>An Iranian delegation met Tuesday with representatives of the remaining parties to the agreement to discuss how to bring Washington back into it and end crippling US sanctions and Iranian countermeasures.</p>.<p>US President Joe Biden has said he is ready to reverse the decision of his predecessor Donald Trump to withdraw from the agreement and reimpose unilateral sanctions.</p>.<p>But differences remain over the mechanics of the move as Tehran has since responded by suspending compliance with some of its own obligations under the deal.</p>.<p>The United States was not present at Tuesday's discussions because Iran has refused to meet the US delegation so long as its sanctions remain in place.</p>.<p>Instead, the European Union acted as an intermediary, but all sides gave a positive assessment of the opening talks.</p>.<p>"A new chapter has just been opened yesterday," Rouhani told a cabinet meeting Wednesday.</p>.<p>"If (Washington) shows it is honest and sincere, that's all we ask... I think we'll be able to negotiate in a short time, if necessary, with the (other parties to the deal)."</p>.<p>In Washington, State Department spokesman Ned Price said that the United States still believed "this is a constructive forum".</p>.<p>"The talks so far have been business-like and they are doing what we envisioned they would," Price told reporters.</p>.<p>"They are affording us a better understanding of Iran's thinking and we hope that in turn Tehran will leave this round of talks with a better understanding of what we might be prepared to do."</p>.<p>The US delegation has set up at a different hotel in Vienna, with EU negotiators acting as go-betweens.</p>.<p>At the same time, two groups of experts -- on lifting sanctions and nuclear issues -- are working "to identify concrete measures to be taken by Washington and Tehran" to restore the deal, Russian envoy Mikhail Ulyanov said.</p>
<p>Iranian President Hassan Rouhani said Wednesday that talks in Vienna on rescuing a troubled 2015 nuclear deal had opened a "new chapter".</p>.<p>An Iranian delegation met Tuesday with representatives of the remaining parties to the agreement to discuss how to bring Washington back into it and end crippling US sanctions and Iranian countermeasures.</p>.<p>US President Joe Biden has said he is ready to reverse the decision of his predecessor Donald Trump to withdraw from the agreement and reimpose unilateral sanctions.</p>.<p>But differences remain over the mechanics of the move as Tehran has since responded by suspending compliance with some of its own obligations under the deal.</p>.<p>The United States was not present at Tuesday's discussions because Iran has refused to meet the US delegation so long as its sanctions remain in place.</p>.<p>Instead, the European Union acted as an intermediary, but all sides gave a positive assessment of the opening talks.</p>.<p>"A new chapter has just been opened yesterday," Rouhani told a cabinet meeting Wednesday.</p>.<p>"If (Washington) shows it is honest and sincere, that's all we ask... I think we'll be able to negotiate in a short time, if necessary, with the (other parties to the deal)."</p>.<p>In Washington, State Department spokesman Ned Price said that the United States still believed "this is a constructive forum".</p>.<p>"The talks so far have been business-like and they are doing what we envisioned they would," Price told reporters.</p>.<p>"They are affording us a better understanding of Iran's thinking and we hope that in turn Tehran will leave this round of talks with a better understanding of what we might be prepared to do."</p>.<p>The US delegation has set up at a different hotel in Vienna, with EU negotiators acting as go-betweens.</p>.<p>At the same time, two groups of experts -- on lifting sanctions and nuclear issues -- are working "to identify concrete measures to be taken by Washington and Tehran" to restore the deal, Russian envoy Mikhail Ulyanov said.</p>