Tetrakis acetonitrile dinitrosyltungsten

In a procedure identical to that described in Section B, the reaction is performed using 2.5 g (7.1 mmol) of hexacarbonyltungsten (Alfa) and 1.66 g (14.2 mmol) of nitrosyl tetrafluoroborate (Aldrich, sublimed 220 °C, 10-3 torr) An emerald green complex is isolated to yield 3.95 g (96%) of cis-tetrakis-(acetonitrile)dinitrosyltungsten(II) bis[tetrafluoroborate(l —)]. 

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