The
N,
N-dimethylanilino tungsten alkylidyne complex [W(
![](/images/entities/tbd1.gif)
CC
6H
4NMe
2-4)(O
2CCF
3)(CO)
2(NC
5H
4Me-4)
2] has been synthesized, characterized,
and employed as a precursor to neutral
and cationic 2,2'-dipyridyl
and TMEDA (
N,
N,
N',
N'-tetramethylethylenediamine) complexes,which display dual blue
and yellow fluorescences in CH
2Cl
2 solutions at ambient temperatures with surprisingly high quantum yields for this class of organometallic complex. Theefficiencies of the radiative emissions from the 2,2'-dipyridyl complex [W(
![](/images/entities/tbd1.gif)
CC
6H
4NMe
2-4)(O
2CCF
3)(CO)
2{
2-2,2'-(NC
5H
4)
2}] are particularly impressive. The dual nature of theemissions (
em ![](/images/entities/ap.gif)
450
and 540-580 nm) is attributed to independent, short-lived (ns) "twistedintramolecular charge transfer" (
1TICT)
and 1d
W-
![](/images/gifchars/pi.gif)
*
W
CAr states, respectively, the formerbeing well understood in organic aromatic systems, but yet to be described for organometalliccomplexes.