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Tetrakis(triphenylphosphine)palladium(0) was first prepared by Lamberto Malatesta et al. in the 1950s by reduction of sodium chloropalladate with hydrazine in the presence of the phosphine. [4] It is commercially available, but can be prepared in two steps from Pd(II) precursors: PdCl 2 + 2 PPh 3 → PdCl 2 (PPh 3) 2
In the first step, PtCl 2 (PPh 3) 2 is generated. In the second step, this platinum(II) complex is reduced. The overall synthesis can be summarized as: K 2 [PtCl 4] + 2KOH + 4PPh 3 + C 2 H 5 OH → Pt(PPh 3) 4 + 4KCl + CH 3 CHO + 2H 2 O. Pt(PPh 3) 4 reacts with oxidants to give platinum(II) derivatives: Pt(PPh 3) 4 + Cl 2 → cis-PtCl 2 (PPh 3 ...
The rate is higher for multiple pregnancies (32.4% compared with 10.6% for singletons), and for first-time mothers (12.9% compared with 10.0% for women in subsequent pregnancies). [56] The overall rate of severe PPH (>1000 ml) was much lower at an overall rate of 2.8%, again with the highest rate in Africa (5.1%). [56]
A Patent Cooperation Treaty/Patent Prosecution Highway (PCT/PPH) pilot program was also started on 29 January 2010 for a planned period of two years. This pilot program enables to "[fast-track] patent examination procedures for PCT applications that have received a positive written opinion of either the International Searching Authority or the International Preliminary Examining Authority, or ...
ATC code P02 Anthelmintics is a therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System, a system of alphanumeric codes developed by the World Health Organization (WHO) for the classification of drugs and other medical products.
A 16th-century Quran opened to show sura (chapter) 2, ayat (verses) 1–4. An āyah ( Arabic : آية , Arabic pronunciation: [ʔaː.ja] ; plural: آيات ʾāyāt ) is a "verse" in the Qur'an , one of the statements of varying length that make up the chapters ( surah ) of the Qur'an and are marked by a number.
An airline ticket showing the price with ISO 4217 code "EUR" (bottom left) and not with euro currency sign " € "ISO 4217 is a standard published by the International Organization for Standardization (ISO) that defines alpha codes and numeric codes for the representation of currencies and provides information about the relationships between individual currencies and their minor units.
Furthermore- passenger vehicles with an engine capacity greater than 4 cylinders are taxed again and as are those mass greater than 1500 kilogrammes (commonly four-wheel drives and SUV's). Transportation and logistics vehicles, trucks /lorries, buses , vans and utility pick-ups are taxed according to axle number, vehicle mass and maximum safe ...