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Some novel complexes (1-9) of [(η 3 -allyl) Fe(CO)2(NO)] were synthesized by the reaction of tetrabutylammonium ferrate (TBAFe) with different allyl substrates like substituted allyl chlorides, allyl bromides, etc. All the synthesized complexes were characterized on the basis of infrared (IR), nuclear magnetic resonance ( 1 H-NMR and 13 C-NMR), and mass spectroscopic data. The spectroscopic data revealed that decarbonylation occurred in each case. It has also been observed that the cleavage of one CO ligand is more facile when more electron donating substituents are located at the allyl ligand. This tendency goes to an extreme in case of the 1,3-dimethylallyl Fe-complex (9).

Sorbaria tomentosa (LindI.) of family Rosaceae, is a wild, medicinal, ornamental, large, woody plant locally known as “Karhee or Berre”, native to Pakistan. Proximate composition gives important information to assess the suitability of medicinal flora or their extracts taken orally by the trivial communities. In the current study, different proximate parameters like carbohydrate, ash, protein, moisture content and fat, along with carbon, hydrogen, nitrogen and sulphur were analyzed in whole plant of S. tomentosa. The results revealed the occurrence of considerable proportion of carbohydrates (52%) and protein (23.80%). Moisture, fat and ash contents were found in small content 6.25, 2.02 and 0.20%, respectively. Elemental analysis displayed the greater content of carbon (44.92%) followed by content of hydrogen (6.16%), nitrogen (5.17%) and sulphur (0.43%). GC-MS analysis of n-hexane fraction of S. tomentosa led to identification of five compounds viz., 3, 13-Dimethylpentadecanoic acid (1), 2, 4-Dimethyltetradecanoic acid (2), 2, 4-Heptadecadienoic acid; Etester (3), 2-Butylcyclopropanedodecanoic acid (4) and Heptadecanoic acid; Et ester (5). Toxicity tests, further isolation and identification of active constituents of test weed could confirm the discovery of novel plant drugs and safety in administration.

In this paper we report the preparation of two (h3-allyl)carbonylnitrosyltriphenylphosphine iron complexes i.e.(p-allyl)carbonylnitrosyltriphenylphosphine iron (1) and (2-methyl-p-allyl) carbonylnit rosyltriphenylphosphine iron (2). These complexes (1) and (2) were prepared by reacting (p-allyl)dicarbonylnitrosyl iron and (2-methyl-p-allyl)dicarbonylnitrosyl iron with triphenylphosphine under inert atmospheric conditions. Both the resulting complexes were sufficiently and well characterized by IR, 1H NMR, 13C NMR, ESI/MS, HRMS and single crystal XRD. Triphenylphosphine ligand was found to be strong sigma donor and replaced carbonyl ligand readily. XRD revealed that the geometry of iron in both complexes is distorted octahedral.

Authors' Contribution KNW conceived the project, collected the samples, planned and performed the research, statistically analyzed the data and composed the research paper. ZM and SH guided, facilitated and supervised the research.