Synthesis and Vibrational and Mass Spectra of Ph₃SnO₂PMe₂, Ph₃SnO₂PMePh and Ph₃SnO₂PPh₂

Abstract

IR Spectra, R am an Spectra, Mass Spectra, T riphenyltin D im eth y lp h o sp h in ate T he reactions of (P h 3Sn)20 with P hM eP O C l and w ith P h2P O C l lead to P h 3S n 0 2PM ePh and P h 3S n 0 2PPh2, respectively. Ph3S n 0 2P M e2 has b een p re p a red from the reactio n of (P h 3S n)20 and M e2P 0 2H in toluene. The IR and R am an spectra o f Ph3S n 0 2PM e2, P h 3S nÖ 2PM ePh and P h3S n 0 2P P h2 are found to be consistent w ith polym eric stru ctu res with p entacoordinated tin atom s. The E l mass spectra indicate th a t the principal fragm entation processes of Ph3S n 0 2P R R ' (R R ' = M e2, M ePh, P h2) a p p ear to occur by loss o f phenyl radicals from tin and by elim ination of th e en tire d io rg an o p h o sp h inate group.

Synthesis and Vibrational and Mass Spectra of (n-Bu)2Sn(O2PMe2)2, (n-Bu)2Sn(O2PMePh)2 and (n-Bu)2Sn(O2PPh2)2

“…The Raman spectra of («-Bu)2S n (0 2PM ePh)2 and (n-Bu)2S n (0 2PPh2)2 display bands at 620 cm " 1 assignable to ( C -C -C ) bending of the phenyl groups. Corresponding modes are observed at 618-621 cm -1 in the vibra tional spectra of Ph3S n 0 2P R R ' [3], The absence of this band in the vibrational spectra of (n-Bu)2S n (0 2PM e2)2 supports the given assign ment. The Raman spectra of (n-Bu)2S n (0 2PMePh)2 and (ft-Bu)2S n (0 2PPh2)2 show the characteristic very strong band due to phenyl ring breathing at 1000 and 1001 cm -1, respectively Structural information concerning the SnC2 geom etry can be obtained from the v(SnC2) fre quencies.…”

“…As observed earlier in the vibrational spectra of Ph3S n 0 2P R R ' [3], the vas( P 0 2) frequency of (/?-Bu)2S n (0 2P R R ')2 decreases in the transition from R R ' = Ph2 to R R ' = MePh to R R ' = Me2 as a result of decreasing electron withdrawing power of R R ' in the same direction. The Raman spectra of («-Bu)2S n (0 2PM ePh)2 and (n-Bu)2S n (0 2PPh2)2 display bands at 620 cm " 1 assignable to ( C -C -C ) bending of the phenyl groups.…”

“…(n -B u )2 S n ( 0 2 P M e2 ) Vibrational spectra Table I lists the observed infrared and Raman frequencies of (n-Bu)2S n (0 2P R R ')2 (R R ' = Me2, MePh, Ph2), with the relative intensities and as signments. The frequencies of the 0 ?P R R ' group were assigned by comparison with the vibrational spectra of Ph3S n 0 2P R R ' [3]. The appearance of v (P 0 2) frequencies between 1200 and 1000 cm -1 is consistent with bidentate bonded 0 2P R R ' groups.…”

“…The reactions of organotin oxides with phosphoryl halides (POX3; X = Cl, Br) [1,2] and with organophosphoryl chlorides (R 2POCl) [3] have been used in the synthesis of organotin dihalophosphates and organotin diorganophosphinates respectively. These compounds are generally as signed a polymeric structure with tin atoms joined by O -P -O bridges.…”

“…Recently we have studied the synthesis, vibrational spectra and mass spectra of Ph3S n 0 2PRR' compounds (R R ' = M e2, MePh, Ph2) [3], We report here the reactions of (/7-Bu)2Sn(O CO CH 3)2 with Ph2POCl and with M ePhPOCl and the synthesis of (/i-Bu)2S n (0 2P R R ')2 (R R ' = Me2, MePh, Ph2). The vibrational spectra and the mass spectra of the prepared compounds are assigned and dis cussed.…”