  |  |  |  |  | | | The formula search is used for obtaining an ion or an ionic liquid or a component by its ionic formula or molecular formula. The search is case-insensitive and the elements of the formula may be specified in any order and either in upper case or lower case. Partial formulas are allowed in the criteria. Examples: “C5H9BrN2”, “H15c8”, or “c9h16n4”. |  | | The name search is used for finding either a molecular compound or an ionic compound or an ion by its chemical synonyms. It permits a case-insensitive search with a full name or partial name in the criteria. Examples of “bromide” or “BROMIDE” or “BroMide” in the criteria will all result in the same group of compounds, such as “pyridinium, 1-butyl-, bromide”, “1-ethylpyridinium bromide”, “1H-imidazolium, 1,1'-(1,3-propanediyl) bis*3-ethyl-, dibromide” and so forth. |  | | This search of compounds is carried out based on molecular weight. There are three ways users may specify their values: (1) enter a specified value such as 216.12; (2) use greater than “>” or less then “<” signs such as “>400”; or (3) specify a range by keywords such as “between 200 and 205”. |  | | The ionic charge search is designed for users to identify the cations or anions of interest. An ion is a charged chemical unit: a positive ion is called a cation and a negatively charged ion is called an anion. In order to obtain all cations enter “>0”, and all anions enter “<0”, or to obtain a specified ionic charge such as “-2”, enter “-2”. |  | | The author search permits searches of data sources by using author names, usually in the format of their publication. All authors in a publication may be used in the criteria for name search. The search is performed in case-insensitive mode by entering a full name or partial name. |  | | The time search is used in retrieving references based on the year of publication. The criteria may be prepared in a number of ways, for example, (1) a specified value, such as "2005"; (2) greater than “>” or less then “<”, such as ">2000"; (3) a range value, such as “between 2002 and 2003”; (4) selected individual years, such as “in (2003, 2005)”. |  | | The source search may be conducted for retrieving references by the names of journals and reports. Users may copy and paste a journal name from a list of available journal names and their abbreviations provided in the Hints section of the search page. | |  |  |  |  |  |
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