I have read these entries in the book "the grand duchesses"
Alexandra Pavlovna was the first daughter of Paul I and Maria Feodorovna. She received the usual education of russian princesses and was taught french and german as well as music and drawing. In 1796, she was engaged to the King of sweden. She was only 13 years old. But the negociations failed because of religious considerations (catherine II wanted Alexandra to keep orthodoxy even after her marriage). This disappointment was said to be responsible of the heart attack which killed Catherine II in November 1796.
In 1799, to cement the alliance between Prussia and Russia, GD alexandra pavlovna was married to Archduke Joseph, governor of Hungary and younger brother of the emperor FRanz II.
A year and a half later, Alexandre died of a purpereal fever after giving birth to a daughter who died on the day of her birth. Alexandre was only 17. She was buried in Hungary.
A macabre poscript to Alexandra's short life was to occur half a century after her death. Revolution broke out in Hungary in 1848. The priest in charge of the chapel containing alexandra's tomb broke into the tomb and removed jewels from Alexandra's corpse. The priest was arrested and sent to siberia.
I have noticed that the name "Alexandra" is a curse in the romanov family. So many alexandra died in their youngfuls.