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W(CH 3) 6 adopts a distorted trigonal prismatic geometry with C 3v symmetry for the WC 6 framework and C 3 symmetry including the hydrogen atoms. The structure (excluding the hydrogen atoms) can be thought of as consisting of a central atom, capped on either side by two eclipsing sets of three carbon atoms, with one triangular set slightly larger but also closer to the central atom than the other.
Four are considered stable (182 W, 183 W, 184 W, and 186 W) and one is slightly radioactive, 180 W, with an extremely long half-life of 1.8 ± 0.2 exayears (10 18 years). On average, two alpha decays of 180 W occur per gram of natural tungsten per year, so for most practical purposes, 180 W can be considered stable.
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Cyclopentadienyltungsten tricarbonyl dimer ((C 5 H 5.) 2 W 2 (CO) 6) is produced from W(CO) 6. Treatment of tungsten hexacarbonyl with sodium cyclopentadienide followed by oxidation of the resulting NaW(CO) 3 (C 5 H 5) gives cyclopentadienyltungsten tricarbonyl dimer. [5] One derivative is the dihydrogen complex W(CO) 3 [P(C 6 H 11) 3] 2 (H 2). [2]
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6 Underground premiered at The Shed in New York City on December 10, 2019, and was released by Netflix on December 13, 2019. With a budget of $150 million, the film is one of the most expensive Netflix originals ever made. Rotten Tomatoes called it "loud, frenetic and finally preposterous". [3]
U6 snRNA is the non-coding small nuclear RNA (snRNA) component of U6 snRNP (small nuclear ribonucleoprotein), an RNA-protein complex that combines with other snRNPs, unmodified pre-mRNA, and various other proteins to assemble a spliceosome, a large RNA-protein molecular complex that catalyzes the excision of introns from pre-mRNA.