Version 4.1 of Molecular Weight Calculator for Windows 95 now available. New Features: Ability to expand abbreviations into their elemental equivalencies when used in a formula Why is it better than other programs available? First of all it's free, yet fully functional. I feel it is very powerful, more functional and more user friendly than other molecular weight programs I've found over the net. I'm making it available for others so that they can use it in their research and studies. A Windows 3.x and a Dos version of this program are also available (see below). AVAILABILITY ------------------------------------------------------------------------------ Windows 95 Version (MWTWin v4.1) The program is available via the web at http://www.unc.edu/~monroem/ or at http://www.simtel.net/pub/simtelnet/win95/chem/ in the mwt4_1.zip file. The program is also available via Anonymous FTP at ftp.simtel.net under pub/simtelnet/win95/chem/ in the mwt4_1.zip file, and ftp.ccl.net under the pub/chemistry/software/MS-WINDOWS95/Molecular_Weight/ directory in the mwt4_1.exe file. To save space, the mwt4_1.zip and mwt4_1.exe files do not contain the MSVBVM50.DLL file and do not contain an install program; instead, directions for installation are included in the Readme.Txt file. MSVBVM50.DLL can be downloaded from various sites on the WWW, including: http://www.simtel.net/simtel.net/win95/dll.html under vb5run.zip http://www.sharepaper.com/apps/reviews/q_ufad.html under Visual Basic 5 Runtimes http://www.softseek.com/Utilities/VBRUN_Files/ under VB5 Runtime Files http://www.apexsc.com/vb/davem/vbttdl.html under VB 5 Runtime Files You can also ftp the file from various sites, including: ftp.simtel.net/pub/simtelnet/win95/dll/msvbvm50.zip OAK.Oakland.edu/pub/simtelnet/win95/dll/msvbvm50.zip ftp.uoknor.edu/mirrors/simtelnet/win95/dll/msvbvm50.zip ftp.coast.net/SimTel/win95/dll/msvbvm50.zip Windows Version (MWTWin v3.2) The program is available via the web at http://www.unc.edu/~monroem/ or at http://www.coast.net/SimTel/win3/chem.html and http://www.cdrom.com/simtel.net/win3/chem.html and http://www.simtel.net/pub/simtelnet/win3/chem/ in the mwt3_2.zip file. The program is also available via Anonymous FTP at ftp.coast.net under the SimTel/win3/chem/ directory in the mwt3_2.zip file, at ftp.simtel.net under pub/simtelnet/win3/chem/ in the mwt3_2.zip file, and ftp.ccl.net under the pub/chemistry/software/MS-WINDOWS/Molecular_Weight/ directory in the mwt3_2.exe or mwt3_2s.exe files. Dos Version (MWT v2.87) The program is available via the web at http://www.unc.edu/~monroem/ or at http://www.coast.net/SimTel/msdos/chemstry.html and http://www.cdrom.com/simtel.net/msdos/chemstry.html and http://www.simtel.net/pub/simtelnet/msdos/chemstry/ in the mwt2_87.zip file. The program is also available via Anonymous FTP at ftp.coast.net under the SimTel/msdos/chemstry/ directory in the mwt2_87.zip file, at ftp.simtel.net under pub/simtelnet/msdos/chemstry/ in the mwt2_87.zip file, and ftp.ccl.net under the pub/chemistry/software/MS-DOS/Molecular-Weight-Calculator/ directory in the mwt2_87.exe file. As a final option, I can mail you a UUEncoded or MIME encoded version via e-mail; just drop me a line. Please see my home page for the Windows 3.x and Dos version features. As for the Windows 95 version, ... FEATURES ----------------------------------------------------------------------------- Multi Line Display Display of up to seven formulas with their molecular weights simultaneously. Percent Composition Percent composition of up to seven formulas. Parentheses Are Allowed Handles up to 4 layers of embedded parentheses. For example, (CH3)3CH2CH3 is equivalent to CH3CH3CH3CH2CH3. Hydrates or other appended compounds are allowed. For example, FeCl3-6H2O. User-definable abbreviations Default abbreviations are included for common parts of compounds, including amino acids. See full list in mwtwin.hlp file. Additionally, the abbreviations can be expanded into the elemental equivalencies when used in a formula. For example, PhCl = C6H5Cl and HOac = CH3COOH. Smart Case Conversion The program will automatically convert lowercase letters to uppercase where appropriate for ease of entering a formula. Exact case matching and non-conversion are also available. Edit and save abbreviations while program is running. Isotopes are recognized using the following notation: ^13C is Carbon-13 C6H5^18OH is heavy-oxygen (Oxygen-18) labeled phenol Feature of weighting parts of a compound relative to the other parts. For example, [.2Na]Cl would have a weight of 0.2*22.989768+35.4527=40.0507 NaCl-[.5H2O] would have a weight of 22.989768+35.4527+0.5*(2*1.00794+15.9994)=67.4501 Percent Solver mode for finding the value of "x" in a compound that satisfies user-specified percent composition requirements. Edit and save elemental values while program is running. Accuracy of the final digit of the molecular wt. and percent composition. Capability to set optional features at the command line when starting the program. Capability of saving options as defaults and automatic loading of the saved options upon program start. Easily Cut, Copy, and Paste information between the Molecular Weight Calculator and other Windows applications. Mole/Mass Converter for easily translating moles to mass (kg, g, mg, pounds, ounces) and back. You can also use the mole/mass converter for molarity related calculations. Formula Finder for finding possible compound empirical formulas for a given molecular weight or for a given set of percent composition data. Capability of printing results. Extensive On-Line Help (including context sensitive tool tips) and Error Checking THE AUTHOR ------------------------------------------------------------------------------ Contacting the Author You can contact me by E-mail at Monroem@UNC.Edu About the Author I am a graduate student in chemistry pursuing my Ph.D. at the University of North Carolina in Chapel Hill, NC. I received my B.S. in chemistry at the University of Wyoming in Laramie, WY in May, 1997. I taught myself to program in BASIC on an Apple //c (with 128 Kb of Ram and no hard disk) in 1986 during 6th grade. Since then, I have updated to GW-Basic, then QuickBasic v4.5, QuickBasic v7.1 for DOS, Visual Basic 3.0 for Windows, and now Visual Basic 5.0 for Windows /===========================================================================\ He's dead, Jim. You get his phaser, I'll get his wallet. What are the following? Matthew Monroe Black Angus : Black Angus Chemistry Ph.D. student Black Angus : Texas Longhorn Univ. of North Carolina Black Angus : Brown Swiss ------------------------------------------------- Monroem@UNC.Edu Homogeneous Catalyst : Heterogeneous Catalyst /------------------------------\ | http://www.unc.edu/~monroem/ | This tagline is umop apisdn. \===========================================================================/