4,6-Bis(diphenylphosphino)phenoxazine (nixantphos)

4,6-Bis(diphenyl­phosphino)phenoxazine (nixantphos)

The title compound, C(36)H(27)NOP(2), has been reported as a ligand on rhodium for the catalysis of hydro-formyl-ation reactions. The key feature of the compound is the intra-molecular P⋯P distance of 4.255 (2) Å. The bond angles at the P atoms range from 99.93 (10) to 103.02 (10)°. The phenoxazine ring system is essentially planar and a non-crystallographic mirror plane through the N⋯O vector ...

Substitutional disorder in the substituted nixantphos ligand C39H32Br0.27Cl0.73NOP2

The structure of 10-(3-bromo/chloro-prop-yl)-4,6-bis-(diphenyl-phosphino)-10H-phenoxazine, C(39)H(32)Br(0.27)Cl(0.73)NOP(2), shows chloro/bromo substitutional disorder in a 3:1 ratio. For application as a ligand in catalysis, the intra-molecular P⋯P distance of 4.263 (2) Å is relevant. The phenoxazine ring system is essentially planar.

مجله مالیات،شماره 46، پاییز1386

فهرست مطالب:1- درآمد تحصیل شده از خارج و مسائل مالیاتی مرتبط با آن2- نظام بین المللی مالیاتی3- عقد رهن و رای دیوان عدالت اداری4- بررسی مالیاتی در مورد امارات متحده عربی5-درآمد مشمول مالیات و کسر معافیت ها

46: Iron

Iron poisoning has become uncommon. This success may underscore the importance of prevention by interventions gleaned from poison center data and poison prevention advocacy. Blister packaging, smaller dosages, and education of parents and health care professionals have led to a great decline in iron poisoning in the past two decades. Unfortunately, however, significant iron poisonings still occ...

فهرست شماره 46-45