simdi olay su bu çeviri benim için hayat memat meselesi anime arkı oalrak lütfen yardımlarınızı esirgemeyin herkes bvir ucdan tutsun yardım etsin yoksa okulum uzuyacak.siz yardı medersiniz 2 dk çevirelim sunu yardım edenin her mesajına tesekkür edecem söz




Unexpectedly, the 31P{1H} NMR spectrum of the [1 + 1] assembly 2 displayed two singlets of approximately equal intensity near 9.40 ppm (assigned to PCH2CH3) with concomitant 195Pt satellites (Figure S1, Supporting Information). Their upfield shift relative to 5 (15.33 ppm) is consistent with back-donation from the platinum atoms upon pyridine coordination. When the sample was heated to 80 °C, coalescence of these signals was observed. Changes were also observed in the 1H spectrum (Figure S2, Supporting Information). At room temperature, there was a single, well-defined set of anthracene/pyridyl hydrogens, while complex signals for the ethyl phosphine and methylene groups of the diaza-crown ring were observed. At 80 °C, the ethyl signals simplified dramatically, the methylenes became sharper and more resolved, while the pyridine hydrogens broadened significantly. The spectra returned to their original appearance when the sample was cooled back to room temperature. We believe the nonequivalent phosphine groups in 2 are distorted from their ideal position perpendicular to the anthracene plane at room temperature. At 80 °C, increased rotation makes them indistinguishable by NMR. Partial rotation of the pyridine rings also occurs at elevated temperature, as the two distinct sets of α- and β-hydrogens at room-temperature broaden upon heating. In the mass spectrum (Figure S3, Supporting Information), peaks assignable to [2 − PF6-]+ (m/z = 1600) and [2 − 2PF6-]2+ (m/z = 727) added support for the structure of 2. The former was isotopically resolved and is in excellent agreement with the theoretical distribution. No evidence for any larger assemblies was found.