FRANKFURT, Aug 5 (Reuters) - Germany's Commerzbank , in the midst of a leadership crisis, on Wednesday said it expected to post a net loss for the full year after net profit declined 21% in the second quarter.

The net profit in the second quarter of 220 million euros ($259.97 million) compares with net profit of 279 million euros a year earlier. (Reporting by Tom Sims and Hans Seidenstuecker; Editing by Michelle Martin)