The nazarov cyclization is a versatile method for making five-membered rings, a common feature in many natural products. this process has been used successfully in the preparation of many complex structures with a wide variety of biological activities, including antibiotic and anticancer properties (org. lett. 2003, 5, 4931–4934). the key step of the nazarov cyclization involves a lewis acid, such as alcl3. in the first step of the mechanism, compound 1 interacts with alcl3 to form a lewis acid-lewis base complex. determine the site within compound 1 that interacts most strongly with the lewis acid and justify your choice by exploring the resonance structures of the resulting complex:

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

the objects have the same charge is correct.

nathan lee